Add missing Andorid support design library dependency

Fix various warning

android/java/MapboxGLAndroidSDKTestApp/build.gradle

@@ -85,6 +85,7 @@ dependencies {
     compile 'com.android.support:support-annotations:23.0.0'
     compile 'com.android.support:support-v4:23.0.0'
     compile 'com.android.support:appcompat-v7:23.0.0'
+    compile 'com.android.support:design:23.0.0'
     compile('com.crashlytics.sdk.android:crashlytics:2.5.1@aar') {
         transitive = true;
     }

android/java/MapboxGLAndroidSDKTestApp/src/main/AndroidManifest.xml

@@ -3,11 +3,11 @@
     package="com.mapbox.mapboxgl.testapp">
 
     <application
-        android:allowBackup="false"
+        android:allowBackup="true"
+        android:fullBackupContent="true"
         android:icon="@drawable/icon_burned"
         android:label="@string/app_name"
         android:theme="@style/AppTheme"
-        tools:ignore="UnusedAttribute"
         android:supportsRtl="true">
         <activity
             android:name="com.mapbox.mapboxgl.testapp.MainActivity"

android/java/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxgl/testapp/MainActivity.java

@@ -6,6 +6,7 @@ import android.graphics.Color;
 import android.graphics.PointF;
 import android.location.Location;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.NavigationView;
 import android.support.v4.app.ActivityCompat;
@@ -236,7 +237,7 @@ public class MainActivity extends AppCompatActivity {
     }
 
     @Override
-    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
+    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
         switch (requestCode) {
             case PERMISSIONS_LOCATION: {
                 if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {

android/java/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_main.xml

@@ -16,7 +16,7 @@
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:background="?attr/colorPrimary"
+            android:background="@color/primary"
             android:minHeight="?attr/actionBarSize"
             android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>