avsync-lib: add new module [1/2]

PD#SWPL-28037

Problem:
New AV sync solution for RDK

Solution:
User space AV sync module for westeros

Verify:
U212 + v4l2-uvm-test

Change-Id: I1a3d23d4ed4876ea0cfcc5d9abba38c4750ec3ce
Signed-off-by: Song Zhao <song.zhao@amlogic.com>
17 files changed