mediav2 CTS: Update bit stream utils with Av1 parser

Bug: 270019381
Test: atest android.videocodec.cts.VideoEncoderIntraFrameIntervalTest \
android.videocodec.cts.VideoEncoderMaxBFrameTest

Change-Id: I84c38fef9e2dee2e413f02f2f1b7ffcfb2407b6a
1 file changed