[android] #3943 #3775 #3885 - added sample feature activity + espresso test

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

@@ -0,0 +1,33 @@
+package com.mapbox.mapboxsdk.testapp;
+
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+import android.test.suitebuilder.annotation.LargeTest;
+
+import com.mapbox.mapboxsdk.testapp.utils.ViewUtils;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Tests on DynamicMarkerChange
+ */
+@RunWith(AndroidJUnit4.class)
+@LargeTest
+public class DynamicMarkerChangeActivityTest extends BaseTest {
+
+    @Rule
+    public ActivityTestRule<DynamicMarkerChangeActivity> mActivityRule = new ActivityTestRule<>(
+            DynamicMarkerChangeActivity.class);
+
+    @Test
+     public void testSanity() {
+        checkViewIsDisplayed(R.id.mapView);
+    }
+
+    @Test
+    public void testFabClick() {
+        ViewUtils.clickView(R.id.fab);
+    }
+}

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

@@ -0,0 +1,15 @@
+package com.mapbox.mapboxsdk.testapp.utils;
+
+import android.support.annotation.IdRes;
+
+import static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.action.ViewActions.click;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+
+public class ViewUtils {
+
+    public static void clickView(@IdRes int viewRes) {
+        onView(withId(viewRes))
+                .perform(click());
+    }
+}