v4l2-uvm-test: support TS [1/1]

PD#SWPL-20017

Problem:
TS may not start from a I frame, it will lead to frist output buffer
queue fail.

Solutoin:
Drop non keyframe and make sure SPS/PPS are attached to the first key
frame.

Verify:
U212

Change-Id: I315379dcfa19167bdc0646086f480c454df3ce9e
Signed-off-by: Song Zhao <song.zhao@amlogic.com>
1 file changed