[android] #4283 - enable strict mode in test app + fix strict mode warning related to releasing the surface

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

@@ -1246,11 +1246,13 @@ public class MapView extends FrameLayout {
     // This class handles TextureView callbacks
     private class SurfaceTextureListener implements TextureView.SurfaceTextureListener {
 
+        private Surface mSurface;
+
         // Called when the native surface texture has been created
         // Must do all EGL/GL ES initialization here
         @Override
         public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
-            mNativeMapView.createSurface(new Surface(surface));
+            mNativeMapView.createSurface(mSurface = new Surface(surface));
             mNativeMapView.resizeFramebuffer(width, height);
         }
 
@@ -1261,6 +1263,7 @@ public class MapView extends FrameLayout {
             if (mNativeMapView != null) {
                 mNativeMapView.destroySurface();
             }
+            mSurface.release();
             return true;
         }
 

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/MapboxApplication.java

@@ -1,6 +1,7 @@
 package com.mapbox.mapboxsdk.testapp;
 
 import android.app.Application;
+import android.os.StrictMode;
 
 import com.squareup.leakcanary.LeakCanary;
 
@@ -10,5 +11,17 @@ public class MapboxApplication extends Application {
     public void onCreate() {
         super.onCreate();
         LeakCanary.install(this);
+        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
+                .detectDiskReads()
+                .detectDiskWrites()
+                .detectNetwork()   // or .detectAll() for all detectable problems
+                .penaltyLog()
+                .build());
+        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
+                .detectLeakedSqlLiteObjects()
+                .detectLeakedClosableObjects()
+                .penaltyLog()
+                .penaltyDeath()
+                .build());
     }
 }