Disable ring, notification and touch vibration in silent mode

Disable haptic settings for ring, notification and touch feedback when
the phone ringer mode is set to silent.

Preserve the setting values and display message explaining why those
settings are disabled.

Bug: 203188852
Test: *Vibration[Intensity|Toggle]PreferenceControllerTest
Change-Id: I6c24079ece9d637f2feb487f756937888a92caa7

src/com/android/settings/accessibility/HapticFeedbackIntensityPreferenceController.java

@@ -37,6 +37,12 @@ public class HapticFeedbackIntensityPreferenceController
                     VibrationAttributes.USAGE_TOUCH);
         }
 
+        @Override
+        public boolean isRestrictedByRingerModeSilent() {
+            // Touch feedback is disabled when the phone is in silent mode.
+            return true;
+        }
+
         @Override
         public int readIntensity() {
             final int hapticFeedbackEnabled = Settings.System.getInt(mContentResolver,