audio policy: deprecate ro.camera.sound.forced

The volume and routing policy of AUDIO_STREAM_ENFORCED_AUDIBLE is
now controlled by AudioService.

Do not read ro.camera.sound.forced is not needed anymore.

Bug 7032634.

Change-Id: Ic0a6396fc4b6efb91cdb4dffe0c8eb035d0440bd
1 file changed