RESTRICT AUTOMERGE Camera: Fix missing onPhysicalCameraUnavailable

When onCameraAvailable invoked for a logical multi-camera, all of the
physical cameras of a logical multi-camera are default available (i.e.,
no onPhysicalCameraAvailable would be called). So if some specific
physical cameras are unavailable, onPhysicalCameraUnavailable should be
invoked after onCameraAvailable.

Bug: 262979670
Test: atest CameraManagerTest
Change-Id: I77d32cd1d1c5a6c63950961724af7b41f8cdf1e6