[Settings] Support phone number talkback

Support phone number talkback in about phone UI pages.

Bug: 182923869
Test: local, junit
Change-Id: I159827070a954dee13230ff7cf6de81dbbaa7545
(cherry picked from commit d051e65d3c)

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

@@ -158,7 +158,7 @@ public class PhoneNumberPreferenceController extends BasePreferenceController {
     }
 
     @VisibleForTesting
-    Preference createNewPreference(Context context) {
-        return new Preference(context);
+    protected Preference createNewPreference(Context context) {
+        return new PhoneNumberSummaryPreference(context);
     }
 }