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/DevelopmentSettingsDashboardFragment.java

@@ -423,7 +423,6 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new SelectDebugAppPreferenceController(context, fragment));
         controllers.add(new WaitForDebuggerPreferenceController(context));
         controllers.add(new EnableGpuDebugLayersPreferenceController(context));
-        controllers.add(new GameUpdatePackageDevOptInPreferenceController(context, fragment));
         controllers.add(new VerifyAppsOverUsbPreferenceController(context));
         controllers.add(new LogdSizePreferenceController(context));
         controllers.add(new LogPersistPreferenceController(context, fragment, lifecycle));