Only show app action button if it is not instant app.

- for instant app, we are showing another set of buttons, and hence the
regular app action buttons should be not be available.

Change-Id: I53f2a10921451c281166e123671c088ab87b2b0d
Fixes: 71919219
Test: make RunSettingsRoboTests

src/com/android/settings/applications/appinfo/AppActionButtonPreferenceController.java

@@ -93,7 +93,8 @@ public class AppActionButtonPreferenceController extends BasePreferenceControlle
 
     @Override
     public int getAvailabilityStatus() {
-        return AVAILABLE;
+        return AppUtils.isInstant(mParent.getPackageInfo().applicationInfo)
+            ? DISABLED_FOR_USER : AVAILABLE;
     }
 
     @Override