Let call service retain video ownership while asynchronous shutdown is pending

tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallService.kt

@@ -406,8 +406,8 @@ class CallService : Service() {
         audio.onFailure = null
         audio.router.onChanged = null
         video?.let { owned -> try {
-            owned.stop()
-            video = null
+            if (owned.stop()) video = null
+            else LogManager.addLog("DEBUG", "CallService", "video cleanup pending id=$id; service retains owner")
         } catch (e: Exception) {
             LogManager.addLog("ERROR", "CallService", "video stop failed id=$id; retained for retry: $e")
         } }

tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoEngine.kt

@@ -584,8 +584,8 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
 
     /** Main: запретить producers, join RX и закрыть native port, затем передать camera cleanup worker.
      * Исключение до принятия cleanup не подтверждает stop; следующий вызов повторяет незавершённый этап. */
-    fun stop() {
-        if (stopCleanupPosted) return
+    fun stop(): Boolean {
+        if (stopCleanupPosted) return true
         stopped = true; player.stop(); CallVideoNative.close(id)
         check(handler.post {
             observeOrientation(false)
@@ -600,5 +600,6 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
             "Video cleanup worker rejected stop"
         }
         stopCleanupPosted = true
+        return true
     }
 }