Camera: Add support for client requests&results for advanced extensions

Allow camera clients to query for any orthogonal camera parameters that
can be applied during advanced extension capture sessions.
Enable capture result callbacks in the same scenario as well as single
catpure requests to the preview client surface.

Bug: 198447410
Test: Camera CTS

Change-Id: Ia51cc0813a93963d628ea73beb54ed080f4696e7