Settings: Respect preference's visibility in VideoPreferenceController

* Since AbstractPreferenceController's displayPreference()
  sets the visibility based on isAvailable() we need to
  set mVideoPreference early and make getAvailabilityStatus()
  return UNSUPPORTED_ON_DEVICE if needed.

Test: manual, open battery manager
Change-Id: Ibf72971b49fa1162fb99f9fc61cbb54ba39a2dfa

tests/robotests/src/com/android/settings/widget/VideoPreferenceControllerTest.java

@@ -17,10 +17,13 @@
 package com.android.settings.widget;
 
 import static com.android.settings.core.BasePreferenceController.AVAILABLE_UNSEARCHABLE;
+import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;
 
 import static com.google.common.truth.Truth.assertThat;
 
 import static org.mockito.Mockito.anyBoolean;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
@@ -33,6 +36,7 @@ import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
+import org.robolectric.util.ReflectionHelpers;
 
 @RunWith(RobolectricTestRunner.class)
 public class VideoPreferenceControllerTest {
@@ -52,10 +56,27 @@ public class VideoPreferenceControllerTest {
     }
 
     @Test
-    public void getAvailabilityStatus_isAlwaysAvailable() {
+    public void getAvailabilityStatus_isAvailableUnsearchable() {
+        final VideoPreference videoPreference = mock(VideoPreference.class);
+
+        // Assign mock object to mVideoPreference in controller
+        ReflectionHelpers.setField(mController, "mVideoPreference", videoPreference);
+        doReturn(true).when(videoPreference).isAnimationAvailable();
+
         assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE_UNSEARCHABLE);
     }
 
+    @Test
+    public void getAvailabilityStatus_isUnsupportedOnDevice() {
+        final VideoPreference videoPreference = mock(VideoPreference.class);
+
+        // Assign mock object to mVideoPreference in controller
+        ReflectionHelpers.setField(mController, "mVideoPreference", videoPreference);
+        doReturn(false).when(videoPreference).isAnimationAvailable();
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
+    }
+
     @Test
     public void onPause_shouldCallOnViewInvisibleOnPrefernece() {
         mController.displayPreference(mScreen);