msm: vidc: Add interface to send crop info

This change adds interface for clients to query for crop
through IOCTL VIDIOC_G_CROP. Driver also sends crop
information along with sequence change event.

CRs-Fixed: 2055218
Change-Id: I4253d22cc6efc0b8e7f3b8963ba0ef7e129e5b0a
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>