SurfaceFlinger supports ClearClientTarget for Sideband

When clearing the layer's intersection with the dirty region,
HWC2::Composition::Sideband layer needs to be cleared as well.

Bug: 33443134
Test: manual - enter PIP mode with Live Channel
Change-Id: I4fecc7b5db8a2bf220b681bd087264290d1a2443
1 file changed