GUP: Display a list of Apps and dialogs

1) Add preference controller for gup dashboard and add list preferences
for each entry of the apps
2) Add gup dashboard page to search index
3) Add comprehensive tests for GupPreferenceController

Bug: 119221883
Test: make RunSettingsRoboTests
Change-Id: Ide4934c0dd3901532723e77e74663e5a7b639026

src/com/android/settings/development/DevelopmentOptionsActivityRequestCodes.java

@@ -31,6 +31,4 @@ public interface DevelopmentOptionsActivityRequestCodes {
     int REQUEST_CODE_ANGLE_DRIVER_PKGS = 4;
 
     int REQUEST_CODE_ANGLE_DRIVER_VALUES = 5;
-
-    int REQUEST_CODE_GUP_DEV_OPT_IN_APPS = 6;
 }