Create experiments for visibility check updates

1. The app switch state was ignored for the real caller, which cause the
   real caller check to return allow while the caller check blocked for the
   same condition.

2. The visibility change and check for system process are going to be
   split so they can return different bal codes.

Bug: 306059525
Test: atest BackgroundActivityLaunchTest

Change-Id: I34e8280b4a389a976368e7b6cfad4c910533398b