android: hold wakelock for 30 seconds after received event was processed, to prevent race condition with incoming call activity. (#6224)

* android: hold wakelock for 45 seconds after event is received

* create new lock instances, delay release by 30 seconds

* comment

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/SimplexService.desktop.kt

@@ -1,6 +1,3 @@
 package chat.simplex.common.platform
 
-actual fun getWakeLock(timeout: Long): (() -> Unit) {
-  return {}
-}
-
+actual fun getWakeLock(timeout: Long): (() -> Unit) = {}