Camera: Relax physical stream cropping behavior

Allow physical stream's field-of-view to be larger than that of the
logical stream, thus enabling more robust depth-from-stereo or motion
tracking.

Test: Build
Bug: 153583897
Bug: 157676445
Bug: 157138779
Bug: 155393103
Change-Id: Ibc059396e9d5e7db80b6c2632d26f48774aad4d4