Add FakeFeatureFactory.setupForTest

In AssisGestureSettingsTest, FakeFeatureFactory was used but was
missing a setupForTest call.

Test: cd tests/robotests && \
      ROBOTEST_FILTER=AssistGestureSettingsTest mma

Change-Id: Ie78232d854aee00c7969a3d2dc148354be7de484

tests/robotests/src/com/android/settings/gestures/AssistGestureSettingsTest.java

@@ -32,6 +32,7 @@ import com.android.settingslib.core.AbstractPreferenceController;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Answers;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RuntimeEnvironment;
@@ -43,7 +44,7 @@ import java.util.List;
 @RunWith(SettingsRobolectricTestRunner.class)
 @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
 public class AssistGestureSettingsTest {
-    @Mock
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
     private Context mContext;
     private FakeFeatureFactory mFakeFeatureFactory;
     private AssistGestureSettings mSettings;
@@ -51,6 +52,7 @@ public class AssistGestureSettingsTest {
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
+        FakeFeatureFactory.setupForTest(mContext);
         mFakeFeatureFactory = (FakeFeatureFactory) FakeFeatureFactory.getFactory(mContext);
         mSettings = new AssistGestureSettings();
     }