autoswitch-bluetooth-profile: never use headset profile without input

Autoswitch should make sure the saved headset profile always has an
input route.  Check this on loading/saving it, otherwise reselect it.

Headset mode profile without mic used to make some sense when it wasn't
using the loopback node (ie.  easy way to disable it), but now with the
loopback node this doesn't make sense any more and it's confusing if it
occurs, so we shouldn't allow it.

src/scripts/device/autoswitch-bluetooth-profile.lua

@@ -191,9 +191,6 @@ local function hasProfileInputRoute (device, profile_index)
 end
 
 local function switchDeviceToHeadsetProfile (dev_id)
-  local index
-  local name
-
   -- Find the actual device
   local device = devices_om:lookup {
       Constraint { "bound-id", "=", dev_id, type = "gobject" }
@@ -209,7 +206,7 @@ local function switchDeviceToHeadsetProfile (dev_id)
   end
 
   local cur_profile_name = getCurrentProfile (device)
-  _, index, name = findProfile (device, nil, cur_profile_name)
+  local priority, index, name = findProfile (device, nil, cur_profile_name)
   if hasProfileInputRoute (device, index) then
     Log.info ("Current profile has input route, not switching")
     return
@@ -222,12 +219,17 @@ local function switchDeviceToHeadsetProfile (dev_id)
   end
 
   local saved_headset_profile = getSavedHeadsetProfile (device)
+
   index = INVALID
   if saved_headset_profile then
-    _, index, name = findProfile (device, nil, saved_headset_profile)
+    priority, index, name = findProfile (device, nil, saved_headset_profile)
+    if index ~= INVALID and not hasProfileInputRoute (device, index) then
+      index = INVALID
+      saveHeadsetProfile (device, nil)
+    end
   end
   if index == INVALID then
-    _, index, name = highestPrioProfileWithInputRoute (device)
+    priority, index, name = highestPrioProfileWithInputRoute (device)
   end
 
   if index ~= INVALID then
@@ -267,14 +269,19 @@ local function restoreProfile (dev_id)
 
   local profile_name = getSavedLastProfile (device)
   local cur_profile_name = getCurrentProfile (device)
+  local priority, index, name
 
   if cur_profile_name then
-    Log.info ("Setting saved headset profile to: " .. cur_profile_name)
-    saveHeadsetProfile (device, cur_profile_name)
+    priority, index, name = findProfile (device, nil, cur_profile_name)
+
+    if index ~= INVALID and hasProfileInputRoute (device, index) then
+      Log.info ("Setting saved headset profile to: " .. cur_profile_name)
+      saveHeadsetProfile (device, cur_profile_name)
+    end
   end
 
   if profile_name then
-    local _, index, name = findProfile (device, nil, profile_name)
+    priority, index, name = findProfile (device, nil, profile_name)
 
     if index ~= INVALID then
       local pod = Pod.Object {