Home Controls: Add Device Controls settings

Add a setting that would not require authorization for device controls.

Fixes: 216102581
Test: manual
Change-Id: I1fd98a2fbc1cea44d0b2c3612dd1616a053af394

src/com/android/settings/display/ControlsPrivacyPreferenceController.java

@@ -30,6 +30,9 @@ import com.android.settings.overlay.FeatureFactory;
 
 /**
  * Preference for showing/hiding sensitive device controls content while the device is locked.
+ *
+ * Note that ControlsTrivialPrivacyPreferenceController depends on the preferenceKey
+ * of this controller.
  */
 public class ControlsPrivacyPreferenceController extends TogglePreferenceController {