mm-video-v4l2: vidc: add support for setting operating-rate

Operating-rate hints the incoming rate of frames in
real-time which can be different from the content fps.
This rate will use used to set the correct operating
point for encoder and decoder.

This config will fail with InSufficientResources if the
hardware cannot accomodate the requested operating rate.

Amended by Ashray Kulkarni <ashrayk@codeaurora.org>

bug: 20134262
Change-Id: If3f21067e31a4646ba143b1acd2d075421a6277a
4 files changed