Rootless GPU Debug

This commit adds a new toggle to allow loading GPU debug
layers from the base directory of debuggable applications.

It corresponds to changes to GraphicsEnvironment to look for
matching application and layer list, which are then selectively
passed on the native components, like the Vulkan loader.

Bug: 63708377
Test: Manual, CTS tests to follow
Change-Id: Id6917a7b34df4a37905fafe08a4c1b6503abbb0c

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

@@ -381,6 +381,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new DebugViewAttributesPreferenceController(context));
         controllers.add(new SelectDebugAppPreferenceController(context, fragment));
         controllers.add(new WaitForDebuggerPreferenceController(context));
+        controllers.add(new EnableGpuDebugLayersPreferenceController(context));
         controllers.add(new VerifyAppsOverUsbPreferenceControllerV2(context));
         controllers.add(new LogdSizePreferenceControllerV2(context));
         controllers.add(new LogPersistPreferenceControllerV2(context, fragment, lifecycle));