Fix ringing calls not stopping when the other user cancels the call (#4613)

* Fix ringing calls not being automatically canceled

This will keep the sync active while the user is screening an incoming call, allowing receiving a call cancellation event, which will terminate the incoming call ringing early.

* Add extra logs to help debugging ringing call issues.

services/appnavstate/api/src/main/kotlin/io/element/android/services/appnavstate/api/AppForegroundStateService.kt

@@ -18,6 +18,11 @@ interface AppForegroundStateService {
      */
     val isInForeground: StateFlow<Boolean>
 
+    /**
+     * Updates to whether the app is active because an incoming ringing call is happening will be emitted here.
+     */
+    val hasRingingCall: StateFlow<Boolean>
+
     /**
      * Updates to whether the app is in an active call or not will be emitted here.
      */
@@ -38,6 +43,11 @@ interface AppForegroundStateService {
      */
     fun updateIsInCallState(isInCall: Boolean)
 
+    /**
+     * Update the 'has ringing call' state.
+     */
+    fun updateHasRingingCall(hasRingingCall: Boolean)
+
     /**
      * Update the active state for the syncing notification event flow.
      */