[android] - add config file for excluding generated tests, refactor generation script output

platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/activity/BaseActivityTest.java

@@ -49,8 +49,9 @@ public abstract class BaseActivityTest {
       throw new RuntimeException("Could not start test for " + getActivityClass().getSimpleName() + ".\n"
         + "The ViewHierarchy doesn't contain a view with resource id = R.id.mapView or \n"
         + "the Activity doesn't contain an instance variable with a name equal to mapboxMap.\n"
-        + "You can resolve this issue be implementing the requirements above or\n add "
-        + getActivityClass().getSimpleName() + " to the excludeActivities array in `generate-test-code.js`.\n");
+        + "You can resolve this issue by adding the requirements above or\n add "
+        + getActivityClass().getSimpleName() + " to the platform/android/scripts/exclude-activity-gen.json to blacklist"
+        + " the Activity from being generated.\n");
     }
   }
 
@@ -67,8 +68,7 @@ public abstract class BaseActivityTest {
   protected abstract Class getActivityClass();
 
   protected void checkViewIsDisplayed(int id) {
-    onView(withId(id))
-      .check(matches(isDisplayed()));
+    onView(withId(id)).check(matches(isDisplayed()));
   }
 
   protected void waitLoop() {

platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/utils/OnMapReadyIdlingResource.java

@@ -13,10 +13,8 @@ public class OnMapReadyIdlingResource implements IdlingResource, OnMapReadyCallb
 
   private MapboxMap mapboxMap;
   private IdlingResource.ResourceCallback resourceCallback;
-  private Activity activity;
 
   public OnMapReadyIdlingResource(Activity activity) {
-    this.activity = activity;
     try {
       Field field = activity.getClass().getDeclaredField("mapView");
       field.setAccessible(true);
@@ -24,7 +22,6 @@ public class OnMapReadyIdlingResource implements IdlingResource, OnMapReadyCallb
     } catch (Exception err) {
       throw new RuntimeException(err);
     }
-
   }
 
   @Override
@@ -53,4 +50,4 @@ public class OnMapReadyIdlingResource implements IdlingResource, OnMapReadyCallb
       resourceCallback.onTransitionToIdle();
     }
   }
-}
+}