Avoid sampling outside BQ crop rect

The region outside of the BQ crop rect is potentially
garbage. Avoid sampling from it.

Fixes: 189656466
Bug: 193378020
Test: CTS PixelCopyTests & DecodeAccuracyTest
Change-Id: I2910d93471f08aaf807ac9f87fdf84cf29cf4143
Merged-In: I2910d93471f08aaf807ac9f87fdf84cf29cf4143
1 file changed