Application crashes in Android during swipe kill

[DhirajMakane]

Hi Team,
The application crashes during the swipe kill.

Steps to reproduce:

1. Install and launch the application
2. And turn-by-turn navigation is not started.
3. Now swipe to kill the Android application.

Stack Trace:
com.google.maps.flutter.navigation.GoogleMapsNavigationSessionManager.getNavigator (GoogleMapsNavigationSessionManager.kt:151)
com.google.maps.flutter.navigation.GoogleMapsNavigationSessionManager.unregisterListeners (GoogleMapsNavigationSessionManager.kt:285)
com.google.maps.flutter.navigation.GoogleMapsNavigationSessionManager.onActivityDestroyed (GoogleMapsNavigationSessionManager.kt:139)
com.google.maps.flutter.navigation.GoogleMapsNavigationPlugin.onDetachedFromActivity (GoogleMapsNavigationPlugin.kt:78)
io.flutter.embedding.engine.FlutterEngineConnectionRegistry.detachFromActivity (FlutterEngineConnectionRegistry.java:381)
io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onDetach (FlutterActivityAndFragmentDelegate.java:747)
io.flutter.embedding.android.FlutterFragment.onDetach (FlutterFragment.java:1168)
androidx.fragment.app.Fragment.performDetach (Fragment.java:3386)
androidx.fragment.app.FragmentStateManager.detach (FragmentStateManager.java:850)
androidx.fragment.app.FragmentStateManager.moveToExpectedState (FragmentStateManager.java:349)
androidx.fragment.app.SpecialEffectsController$FragmentStateManagerOperation.complete (SpecialEffectsController.kt:664)
androidx.fragment.app.SpecialEffectsController$Operation.cancel (SpecialEffectsController.kt:507)
androidx.fragment.app.SpecialEffectsController.forceCompleteAllOperations (SpecialEffectsController.kt:293)
androidx.fragment.app.FragmentManager.dispatchStateChange (FragmentManager.java:3037)
androidx.fragment.app.FragmentManager.dispatchDestroy (FragmentManager.java:2988)
androidx.fragment.app.FragmentController.dispatchDestroy (FragmentController.java:346)
androidx.fragment.app.FragmentActivity.onDestroy (FragmentActivity.java:258)
com.hero.vida.MainActivity.onDestroy (MainActivity.kt:444)
android.app.Activity.performDestroy (Activity.java:9255)
android.app.Instrumentation.callActivityOnDestroy (Instrumentation.java:1491)
android.app.ActivityThread.performDestroyActivity (ActivityThread.java:6232)
android.app.ActivityThread.handleDestroyActivity (ActivityThread.java:6277)
android.app.servertransaction.DestroyActivityItem.execute (DestroyActivityItem.java:47)
android.app.servertransaction.ActivityTransactionItem.execute (ActivityTransactionItem.java:45)
android.app.servertransaction.TransactionExecutor.executeLifecycleState (TransactionExecutor.java:180)
android.app.servertransaction.TransactionExecutor.execute (TransactionExecutor.java:98)
android.app.ActivityThread$H.handleMessage (ActivityThread.java:2854)
android.os.Handler.dispatchMessage (Handler.java:108)
android.os.Looper.loopOnce (Looper.java:226)
android.os.Looper.loop (Looper.java:328)
android.app.ActivityThread.main (ActivityThread.java:9242)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:594)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1099)