Use RGB24 format instead of BGR32

BGR32 mode is in RPi3's camera has a RB color swapping issue. This CL
makes to use stable RGB24 mode instead to avoid the problem without
causing any quality regression.

Bug: 69075512
Test: RB color swapping problem is gone on preview, recording and stil.
Exempt-From-Owner-Approval: HAL is owned by Things team.
Change-Id: I109363c0f68cec45f92e739a978f554e70032151
3 files changed