Remove a vibration-related option when there's no vibrator

Bug: 6567160
Change-Id: I1b5d425ffb64b2d7390cd0b7be0825f6aca17f41
diff --git a/java/src/com/android/inputmethod/latin/Settings.java b/java/src/com/android/inputmethod/latin/Settings.java
index 08f3e84..c9ff0a5 100644
--- a/java/src/com/android/inputmethod/latin/Settings.java
+++ b/java/src/com/android/inputmethod/latin/Settings.java
@@ -151,6 +151,11 @@
 
         if (!VibratorUtils.getInstance(context).hasVibrator()) {
             generalSettings.removePreference(findPreference(PREF_VIBRATE_ON));
+            final PreferenceGroup advancedSettings =
+                    (PreferenceGroup) findPreference(PREF_ADVANCED_SETTINGS);
+            if (null != advancedSettings) { // Theoretically advancedSettings cannot be null
+                advancedSettings.removePreference(findPreference(PREF_VIBRATION_DURATION_SETTINGS));
+            }
         }
 
         final boolean showPopupOption = res.getBoolean(