Camera: Remove fwk only keys after they are used

The fwk only keys should be removed after all the
updates on CaptureRequest keys are done.

Also fix up a wrongly flipped boolean in ag/30529258.

Flag: EXEMPT bug-fix
Test: atest CaptureRequestTest#testZoomRatioWithMethod
Bug: 380532555
Bug: 380950927
Change-Id: Ied94280d77fa2e24bc214d6d55d80eba74d72127