Add reprocess method, redefine gralloc ZSL usage flag

- Camera2: Add allocate_reprocess_stream_from_stream for ZSL usecases
- Gralloc: Make GRALLOC_USAGE_HW_CAMERA_ZSL be simply
  GRALLOC_USAGE_HW_CAMERA_READ | GRALLOC_USAGE_HW_CAMERA_WRITE
- Gralloc: Add GRALLOC_USAGE_HW_CAMERA_MASK

Change-Id: Icd8ac1f786e3adb6a422f27f03a5a4cb04a815cc
2 files changed