msm: vidc: add support to set low latency property to venus

Add support for clients to enable low latency property to venus firmware
to reduce the first frame delay in video encoding usecases.

Change-Id: Ifc45215f8a94cb9f0c67279dd77b56424a967790
Signed-off-by: Srinu Gorle <sgorle@codeaurora.org>