[Settings] Support phone number talkback

Support phone number talkback in about phone UI pages.

Bug: 182923869
Test: local, junit
Change-Id: I159827070a954dee13230ff7cf6de81dbbaa7545

src/com/android/settings/deviceinfo/PhoneNumberPreferenceController.java

@@ -159,6 +159,6 @@ public class PhoneNumberPreferenceController extends BasePreferenceController {
 
     @VisibleForTesting
     protected Preference createNewPreference(Context context) {
-        return new Preference(context);
+        return new PhoneNumberSummaryPreference(context);
     }
 }