Sync Protocol Buffers with libsignal-service-java (#2046)

Synchronizes our protocol buffers with `libsignal-service-java` project.

**Changes**
- [x] **BREAKING:** Rename `package` from `textsecure` to `signalservice`.
      ⚠️~~Workaround: Rename back to `textsecure`.~~
      Changed all protobuf `package` names across our project.
- [x] Rename `java_` metadata.
- [x] Move `NullMessage`, `ReceiptMessage`, and `Verified`.
- [x] Rename `Contacts.isComplete` to `Contacts.complete`. Confirmed to be
      unreferenced in our project.
- [x] Rename `Settings` to `Configuration` (`textsecure.protobuf.Settings` seems
      to be unused)
  - [x] Rename `libtextsecure` `MessageReceiver` `settings` event to
        `configuration`.
- [x] Rename `ReceiptMessage.timestamps` to `ReceiptMessage.timestamp`.
- [x] Add `AttachmentPointer` `width` and `height`.
- [x] Renamed `IncomingPushMessageSignal.proto` to `SignalService.proto` to
      match server.

---

commit 2b6aa19bf9ea5d8f2f4fd9e4102699a9d06a2b45
Author: Daniel Gasienica <daniel@gasienica.ch>
Date:   Wed Feb 14 19:41:24 2018 -0500

    Rename protobuf `package`: `textsecure` --> `signalservice`

    Brings us closer to `libsignal-service-java`.

commit 91612880a5bf2c9ae8a9334877ac24e91102b905
Author: Daniel Gasienica <daniel@gasienica.ch>
Date:   Wed Feb 14 19:19:35 2018 -0500

    Rename `SyncMessage.Settings` to `SyncMessage.Configuration`

commit 848eb9559928c54dffd3426bba8e7cd7b1687cdc
Author: Daniel Gasienica <daniel@gasienica.ch>
Date:   Tue Feb 13 20:16:43 2018 -0500

    Rename `ReadReceipt` `timestamps` --> `timestamp`

commit 39859e64b41ddf41127b52d963fe7cc2b9fcad68
Author: Daniel Gasienica <daniel@gasienica.ch>
Date:   Wed Feb 14 18:43:42 2018 -0500

    Rename `IncomingPushMessageSignal.proto` to `SignalService.proto`

    This matches the `libsignal-service-java` filename.

commit fd4bfd76af57ffa44178caf21d350cca211dc048
Author: Daniel Gasienica <daniel@gasienica.ch>
Date:   Tue Feb 13 16:24:36 2018 -0500

    Revert protobuf `package` to `textsecure`

    This was a breaking change and would need to be introduced with additional
    changes.

commit 9f618fa91717a0349f1ea28bf6d365ef0a5c9ca5
Author: Daniel Gasienica <daniel@gasienica.ch>
Date:   Tue Feb 13 16:09:55 2018 -0500

    Sync service protocol buffers with Java project

    Snapshot: 4684a49b2e/protobuf/SignalService.proto

protos/DeviceMessages.proto

@@ -1,4 +1,4 @@
-package textsecure;
+package signalservice;
 
 message ProvisioningUuid {
  optional string uuid = 1;

protos/SignalService.proto

@@ -1,7 +1,8 @@
-package textsecure;
+// Source: https://github.com/signalapp/libsignal-service-java/blob/4684a49b2ed8f32be619e0d0eea423626b6cb2cb/protobuf/SignalService.proto
+package signalservice;
 
-option java_package = "org.whispersystems.textsecure.internal.push";
-option java_outer_classname = "TextSecureProtos";
+option java_package = "org.whispersystems.signalservice.internal.push";
+option java_outer_classname = "SignalServiceProtos";
 
 message Envelope {
   enum Type {
@@ -22,40 +23,13 @@ message Envelope {
 }
 
 message Content {
-  optional DataMessage dataMessage       = 1;
-  optional SyncMessage syncMessage       = 2;
-  optional CallMessage callMessage       = 3;
-  optional NullMessage nullMessage       = 4;
+  optional DataMessage    dataMessage    = 1;
+  optional SyncMessage    syncMessage    = 2;
+  optional CallMessage    callMessage    = 3;
+  optional NullMessage    nullMessage    = 4;
   optional ReceiptMessage receiptMessage = 5;
 }
 
-message ReceiptMessage {
-  enum Type {
-    DELIVERY = 0;
-    READ     = 1;
-  }
-
-  optional Type   type        = 1;
-  repeated uint64 timestamps  = 2;
-}
-
-message NullMessage {
-  optional bytes padding = 1;
-}
-
-message Verified {
-  enum State {
-    DEFAULT    = 0;
-    VERIFIED   = 1;
-    UNVERIFIED = 2;
-  }
-
-  optional string destination = 1;
-  optional bytes  identityKey = 2;
-  optional State  state       = 3;
-  optional bytes  nullMessage = 4;
-}
-
 message CallMessage {
   message Offer {
     optional uint64 id          = 1;
@@ -92,7 +66,7 @@ message CallMessage {
 
 message DataMessage {
   enum Flags {
-    END_SESSION = 1;
+    END_SESSION             = 1;
     EXPIRATION_TIMER_UPDATE = 2;
     PROFILE_KEY_UPDATE      = 4;
   }
@@ -103,6 +77,34 @@ message DataMessage {
   optional uint32             flags       = 4;
   optional uint32             expireTimer = 5;
   optional bytes              profileKey  = 6;
+  optional uint64             timestamp   = 7;
+}
+
+message NullMessage {
+  optional bytes padding = 1;
+}
+
+message ReceiptMessage {
+  enum Type {
+    DELIVERY = 0;
+    READ     = 1;
+  }
+
+  optional Type   type      = 1;
+  repeated uint64 timestamp = 2;
+}
+
+message Verified {
+  enum State {
+    DEFAULT    = 0;
+    VERIFIED   = 1;
+    UNVERIFIED = 2;
+  }
+
+  optional string destination = 1;
+  optional bytes  identityKey = 2;
+  optional State  state       = 3;
+  optional bytes  nullMessage = 4;
 }
 
 message SyncMessage {
@@ -115,7 +117,7 @@ message SyncMessage {
 
   message Contacts {
     optional AttachmentPointer blob     = 1;
-    optional bool              isComplete = 2 [default = false];
+    optional bool              complete = 2 [default = false];
   }
 
   message Groups {
@@ -143,19 +145,19 @@ message SyncMessage {
     optional uint64 timestamp = 2;
   }
 
-  message Settings {
+  message Configuration {
     optional bool readReceipts = 1;
   }
 
-  optional Sent     sent     = 1;
-  optional Contacts contacts = 2;
-  optional Groups   groups   = 3;
-  optional Request  request  = 4;
-  repeated Read     read     = 5;
-  optional Blocked  blocked  = 6;
-  optional Verified verified = 7;
-  optional bytes    padding  = 8;
-  optional Settings settings = 9;
+  optional Sent          sent          = 1;
+  optional Contacts      contacts      = 2;
+  optional Groups        groups        = 3;
+  optional Request       request       = 4;
+  repeated Read          read          = 5;
+  optional Blocked       blocked       = 6;
+  optional Verified      verified      = 7;
+  optional Configuration configuration = 9;
+  optional bytes         padding       = 8;
 }
 
 message AttachmentPointer {
@@ -171,6 +173,8 @@ message AttachmentPointer {
   optional bytes   digest      = 6;
   optional string  fileName    = 7;
   optional uint32  flags       = 8;
+  optional uint32  width       = 9;
+  optional uint32  height      = 10;
 }
 
 message GroupContext {

protos/SubProtocol.proto

@@ -14,7 +14,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-package textsecure;
+package signalservice;
 
 option java_package = "org.whispersystems.websocket.messages.protobuf";
 
@@ -42,4 +42,4 @@ message WebSocketMessage {
   optional Type                     type     = 1;
   optional WebSocketRequestMessage  request  = 2;
   optional WebSocketResponseMessage response = 3;
-}
+}

protos/WhisperTextProtocol.proto

@@ -1,4 +1,4 @@
-package textsecure;
+package signalservice;
 
 option java_package = "org.whispersystems.libsignal.protocol";
 option java_outer_classname = "WhisperProtos";