Monkey crashes (#10440)

* [android] - avoid null map from trackballevent

* [android] - fixup animated marker test activity from monkey runs

* [android] - harden NativeMapView OnMapChangeListener

* [android] - harden against destroyed wrapper activity while moving touch pointers

* [android] - harden bulk marker activity for monkey runner

* [android] - harden scale end gesture event for null velocity tracker

* [android] - invalid mapboxMap invocation

* [android] - reset test setup

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapGestureDetector.java

@@ -235,8 +235,10 @@ final class MapGestureDetector {
         velocityTracker = null;
         break;
       case MotionEvent.ACTION_MOVE:
-        velocityTracker.addMovement(event);
-        velocityTracker.computeCurrentVelocity(1000);
+        if (velocityTracker != null) {
+          velocityTracker.addMovement(event);
+          velocityTracker.computeCurrentVelocity(1000);
+        }
         break;
     }
 
@@ -551,6 +553,11 @@ final class MapGestureDetector {
     // Called when fingers leave screen
     @Override
     public void onScaleEnd(final ScaleGestureDetector detector) {
+      if (velocityTracker == null) {
+        return;
+      }
+
+
       if (rotateGestureOccurred || quickZoom) {
         reset();
         return;

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/NativeMapView.java

@@ -1082,7 +1082,9 @@ final class NativeMapView {
   //
 
   void addOnMapChangedListener(@NonNull MapView.OnMapChangedListener listener) {
-    mapView.addOnMapChangedListener(listener);
+    if (mapView != null) {
+      mapView.addOnMapChangedListener(listener);
+    }
   }
 
   void removeOnMapChangedListener(@NonNull MapView.OnMapChangedListener listener) {

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/Transform.java

@@ -238,16 +238,18 @@ final class Transform implements MapView.OnMapChangedListener {
   }
 
   void setZoom(double zoom, @NonNull PointF focalPoint, long duration) {
-    mapView.addOnMapChangedListener(new MapView.OnMapChangedListener() {
-      @Override
-      public void onMapChanged(int change) {
-        if (change == MapView.REGION_DID_CHANGE_ANIMATED) {
-          cameraChangeDispatcher.onCameraIdle();
-          mapView.removeOnMapChangedListener(this);
+    if (mapView != null) {
+      mapView.addOnMapChangedListener(new MapView.OnMapChangedListener() {
+        @Override
+        public void onMapChanged(int change) {
+          if (change == MapView.REGION_DID_CHANGE_ANIMATED) {
+            cameraChangeDispatcher.onCameraIdle();
+            mapView.removeOnMapChangedListener(this);
+          }
         }
-      }
-    });
-    mapView.setZoom(zoom, focalPoint, duration);
+      });
+      mapView.setZoom(zoom, focalPoint, duration);
+    }
   }
 
   // Direction

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/annotation/AnimatedMarkerActivity.java

@@ -236,12 +236,14 @@ public class AnimatedMarkerActivity extends AppCompatActivity {
 
     stopped = true;
 
-    // Stop ongoing animations, prevent memory lekas
-    MarkerViewManager markerViewManager = mapboxMap.getMarkerViewManager();
-    for (MarkerView markerView : markerViews) {
-      View view = markerViewManager.getView(markerView);
-      if (view != null) {
-        view.animate().cancel();
+    // Stop ongoing animations, prevent memory leaks
+    if (mapboxMap != null) {
+      MarkerViewManager markerViewManager = mapboxMap.getMarkerViewManager();
+      for (MarkerView markerView : markerViews) {
+        View view = markerViewManager.getView(markerView);
+        if (view != null) {
+          view.animate().cancel();
+        }
       }
     }
 

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/annotation/BulkMarkerActivity.java

@@ -100,6 +100,10 @@ public class BulkMarkerActivity extends AppCompatActivity implements AdapterView
   }
 
   private void showMarkers(int amount) {
+    if (mapboxMap == null || locations == null) {
+      return;
+    }
+
     mapboxMap.clear();
 
     if (locations.size() < amount) {