Fix notification preferences

- ImportancePreference should not be separately clickable
- new strings

Bug: 127796543
Fixes: 131060409
Test: make sure talkback doesn't read 'double tap to activate' when
the preference is focused

Change-Id: I6b6eef0915873b4e0b44c59758e5f4b5a265364b

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

@@ -91,6 +91,7 @@ public class ImportancePreference extends Preference {
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);
+        holder.itemView.setClickable(false);
 
         TextView textView = (TextView) holder.findViewById(R.id.description);
         mSilenceButton = (Button) holder.findViewById(R.id.silence);