Deprecate HIDL cameraservice

This prevents the HIDL cameraservice from being registered after FCM
level 7.
Demote the error message to a warning when the HIDL cameraservice fails
to register.

Test: boot cuttlefish and verify no HIDL cameraservice and no crash in
cameraserver.
Bug: 205764761

Change-Id: I786c2ed74d272a9546d2acd901cc2159243c603a
2 files changed