Split ring and notification vibration settings

Synchronize settings between sound and accessibility menus

Bug: 116172311
Test: See accessibility vibration settings - ring and notification
settings sould be separate. Try changing vibration settings in sound and
accessibility menus - the settings should stay in sync.

Change-Id: I515a7188cdf5a26a229ac8f08c6fcfe98e2f91a0

tests/robotests/src/com/android/settings/accessibility/VibrationPreferenceFragmentTest.java

@@ -160,6 +160,11 @@ public class VibrationPreferenceFragmentTest {
             return Settings.System.HAPTIC_FEEDBACK_INTENSITY;
         }
 
+        @Override
+        protected String getVibrationEnabledSetting() {
+            return "";
+        }
+
         @Override
         protected int getDefaultVibrationIntensity() {
             return Vibrator.VIBRATION_INTENSITY_MEDIUM;