gralloc1: Drop ZSL check

The gralloc1 header does not have a clearly defined ZSL mask.
Ignore the ZSL flag (which was previous just a combination of
camera read and write) and check for read/write separately

Bug: 36072030
CRs-Fixed: 2018754
Change-Id: I337df6860cf8098ef51f5affc0b8b79242e77824
1 file changed