Remove mVideoPaused from VideoPreference

- We destoryed the MediaPlayer when VideoPreference is onPause().
When VideoPreference is onResumed, MediaPlayer always start from
pause state, we don't need a data save/restore current video state.

Bug: 143270527
Test: robolectric, manual
Change-Id: I544e933e4237f6d92aeff8a7eb04b52e89d74a4a

src/com/android/settings/biometrics/face/FaceSettings.java

@@ -259,7 +259,6 @@ public class FaceSettings extends DashboardFragment {
     private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
             Lifecycle lifecycle) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
-        controllers.add(new FaceSettingsVideoPreferenceController(context));
         controllers.add(new FaceSettingsKeyguardPreferenceController(context));
         controllers.add(new FaceSettingsAppPreferenceController(context));
         controllers.add(new FaceSettingsRemoveButtonPreferenceController(context));