Fix App data usage screen header title changing after device orientation

- Chageed the title "App data usage" to "Mobile data & Wi-Fi"

Change-Id: I0fa00180eedda6be6189f871f9984ac164f9fb67
Fixes: 118770561
Test: visual & robotests

src/com/android/settings/datausage/UnrestrictedDataAccessPreference.java

@@ -82,7 +82,7 @@ public class UnrestrictedDataAccessPreference extends AppSwitchPreference implem
         if (mDataUsageState.isDataSaverBlacklisted) {
             // app is blacklisted, launch App Data Usage screen
             AppInfoDashboardFragment.startAppInfoFragment(AppDataUsage.class,
-                    R.string.app_data_usage,
+                    R.string.data_usage_app_summary_title,
                     null /* arguments */,
                     mParentFragment,
                     mEntry);