api: rename 3GPP and CDMA interface paths

Elements in a DBus interface name cannot start with a digit, so
"org.freedesktop.ModemManager1.Modem.3gpp" is an invalid interface name.

Renamed here all relevant interfaces so that they have an additional "Modem"
prefix in the element, so we get now:
 "org.freedesktop.ModemManager1.Modem.Modem3gpp"
 "org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd"
 "org.freedesktop.ModemManager1.Modem.ModemCdma"

Objects generated with gdbus-codegen maintain the previous names.

new/all.xml

@@ -7,9 +7,9 @@
   <xi:include href="org.freedesktop.ModemManager1.Bearer.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Sms.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.xml"/>
-  <xi:include href="org.freedesktop.ModemManager1.Modem.3gpp.xml"/>
-  <xi:include href="org.freedesktop.ModemManager1.Modem.3gpp.Ussd.xml"/>
-  <xi:include href="org.freedesktop.ModemManager1.Modem.Cdma.xml"/>
+  <xi:include href="org.freedesktop.ModemManager1.Modem.Modem3gpp.xml"/>
+  <xi:include href="org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd.xml"/>
+  <xi:include href="org.freedesktop.ModemManager1.Modem.ModemCdma.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Messaging.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Location.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Firmware.xml"/>

new/org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd.xml

@@ -12,12 +12,12 @@
 <node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
 
   <!--
-      org.freedesktop.ModemManager1.Modem.3gpp.Ussd:
+      org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd:
       @short_description: The ModemManager 3GPP USSD interface.
 
       This interface provides access to actions based on the USSD protocol.
   -->
-  <interface name="org.freedesktop.ModemManager1.Modem.3gpp.Ussd">
+  <interface name="org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd">
 
     <!--
         Initiate:
@@ -43,7 +43,7 @@
 
         Respond to a USSD request that is either initiated by the mobile network,
         or that is awaiting further input after
-        <link linkend="gdbus-method-org-freedesktop-ModemManager1-Modem-3gpp-Ussd.Initiate">Initiate()</link>
+        <link linkend="gdbus-method-org-freedesktop-ModemManager1-Modem-Modem3gpp-Ussd.Initiate">Initiate()</link>
         was called.
     -->
     <method name="Respond">
@@ -82,7 +82,7 @@
 
         Contains any pending network-initiated request for a response. Client
         should call
-        <link linkend="gdbus-method-org-freedesktop-ModemManager1-Modem-3gpp-Ussd.Respond">Respond()</link>
+        <link linkend="gdbus-method-org-freedesktop-ModemManager1-Modem-Modem3gpp-Ussd.Respond">Respond()</link>
         with the appropriate response to this request.
 
         When no USSD session is active, or when there is no pending

new/org.freedesktop.ModemManager1.Modem.Modem3gpp.xml

@@ -12,13 +12,13 @@
 <node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
 
   <!--
-      org.freedesktop.ModemManager1.Modem.3gpp:
+      org.freedesktop.ModemManager1.Modem.Modem3gpp:
       @short_description: The ModemManager 3GPP interface.
 
       This interface provides access to specific actions that may be performed
       in modems with 3GPP capabilities.
   -->
-  <interface name="org.freedesktop.ModemManager1.Modem.3gpp">
+  <interface name="org.freedesktop.ModemManager1.Modem.Modem3gpp">
 
     <!--
         Register:
@@ -140,4 +140,3 @@
 
   </interface>
 </node>
-

new/org.freedesktop.ModemManager1.Modem.ModemCdma.xml

@@ -12,13 +12,13 @@
 <node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
 
   <!--
-      org.freedesktop.ModemManager1.Modem.Cdma:
+      org.freedesktop.ModemManager1.Modem.ModemCdma:
       @short_description: The ModemManager CDMA interface.
 
       This interface provides access to specific actions that may be performed
       in modems with CDMA capabilities.
   -->
-  <interface name="org.freedesktop.ModemManager1.Modem.Cdma">
+  <interface name="org.freedesktop.ModemManager1.Modem.ModemCdma">
 
     <!--
         Activate: