CameraServiceProxy: Clean up app compat overrides

The rotate&crop heuristics must now return specific
modes instead of true&false. Various modes are not
supported by the app compat overrides which can only be
enabled or disabled.
Clean up unnecessary app compat overrides that can not
be supported and update the corresponding comments.

Bug: 204587197
Test: Manual using application
Change-Id: Iacb6844c625092a9864ab5ff7cae7376cfd2cd9a