Stop invoke initAppOps in Camera default constructor.

Camera default constructor does not create the underlying native camera
object. Thus calling _enableShutterSound after the default constuctor
causes application crash.

Bug: 80498247
Test: Manually modify the code to return MODE_IGNORED for
      AppOpsService#checkAudioOperation() and to return false for
      CameraManager#supportsCamera2ApiLocked. Then start voice call in
      Hangouts.

Change-Id: Id738c4d46a8e3625bc3b1142b11acac9cfb0b603
Merged-In: Id738c4d46a8e3625bc3b1142b11acac9cfb0b603
(cherry picked from commit cb63c640)