Change the permission labels to lowercase.

In the summary for Apps permissions, change the list of permissions
lable to lowercase instead.

Change-Id: I5b3133c33de7110dbec6ab179c6f1308c4ed481e
Fixes: 65049565
Test: make RunSettingsRoboTests

src/com/android/settings/applications/AppPermissionsPreferenceController.java

@@ -111,7 +111,7 @@ public class AppPermissionsPreferenceController extends AbstractPreferenceContro
     }
 
     private CharSequence concatSummaryText(CharSequence currentSummary, String permission) {
-        final CharSequence label = getPermissionGroupLabel(permission);
+        final String label = getPermissionGroupLabel(permission).toString().toLowerCase();
         if (TextUtils.isEmpty(currentSummary)) {
             return label;
         }