Camera: Physical camera avail callbacks can happen for unavail camera

Allow onPhysicalCameraAvailable and onPhysicalCameraUnavailable be
called when the logical camera is unavailable.

This makes it possible for the application using the logical camera to
listen to the physical camera callback.

Gate the behavior change based on targetSdkVersion and app compat
framework.

Test: Camera CTS
Bug: 244358506
Bug: 266649122
Change-Id: I37bf6b721c3a13a67f08a573d688cfd5256e7afd