gst-plugin-video-sink: CB1 set secure mode if get svp event [1/1]

PD#SWPL-81049

Problem:
No lock to protect sink context

Solution:
Add lock to protect sink context

Verify:
AP212

Change-Id: I95093bbb3c6ac4b76c5b59bf421228acbc384a54
Signed-off-by: sheng.liu <sheng.liu@amlogic.com>
1 file changed