SurfaceFlinger: fix no small window displayed in PIP mode of DTVKIT [1/1]

Bug:146758432
PD#SWPL-39338

Problem:
Dtvkit, no small window displayed in pip mode

Solution:
porting from I82d81ded
For surfaceview of tv sideband, there is no activeBuffer in bufferqueue.
ClientCompostion layer if above it need plug holes for this case.

Verify:
ohm

Change-Id: Id92c3856eb8eb5a14813336f723d30b7a17514b1
Signed-off-by: Tianhua Sun <tianhua.sun@amlogic.com>