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/impl/src/main/kotlin/io/element/android/services/appnavstate/impl/DefaultAppForegroundStateService.kt

@@ -17,6 +17,7 @@ class DefaultAppForegroundStateService : AppForegroundStateService {
     override val isInForeground = MutableStateFlow(false)
     override val isInCall = MutableStateFlow(false)
     override val isSyncingNotificationEvent = MutableStateFlow(false)
+    override val hasRingingCall = MutableStateFlow(false)
 
     private val appLifecycle: Lifecycle by lazy { ProcessLifecycleOwner.get().lifecycle }
 
@@ -28,6 +29,10 @@ class DefaultAppForegroundStateService : AppForegroundStateService {
         this.isInCall.value = isInCall
     }
 
+    override fun updateHasRingingCall(hasRingingCall: Boolean) {
+        this.hasRingingCall.value = hasRingingCall
+    }
+
     override fun updateIsSyncingNotificationEvent(isSyncingNotificationEvent: Boolean) {
         this.isSyncingNotificationEvent.value = isSyncingNotificationEvent
     }