Non-blockable whitelist should only control importance fields

Sounds, etc. should still be modifiable

Test: robotests
Fixes: 130086523
Change-Id: I1a95a73b299bb3afd169b249a3dabae3583a448a

src/com/android/settings/notification/VibrationPreferenceController.java

@@ -56,7 +56,7 @@ public class VibrationPreferenceController extends NotificationPreferenceControl
         if (mChannel != null) {
             RestrictedSwitchPreference pref = (RestrictedSwitchPreference) preference;
             pref.setDisabledByAdmin(mAdmin);
-            pref.setEnabled(!pref.isDisabledByAdmin() && isChannelConfigurable());
+            pref.setEnabled(!pref.isDisabledByAdmin());
             pref.setChecked(mChannel.shouldVibrate());
         }
     }