Revert "gralloc: Backward compat for devices using older camera heap"

This reverts commit 47aa5b2c6c1eccf88ac8e354ccae53d44670f6f4.
gralloc: add back GRALLOC_USAGE_PRIVATE_CAMERA_HEAP for Vdec
Merge branch 'cm-11.0' of https://github.com/paulb-nl/android_hardware_qcom_display-legacy into cm-11.0-adreno-wip