Add gralloc1 flags for direct mode sensors and SSBO/UBO buffers.

Added enums:
  * SENSOR_DIRECT_DATA
  * GPU_DATA_BUFFER
  
Also, change the wording according to guideline.

Bug: 30985702
Test: non-functional change
Change-Id: I80f4b02d3b4fda07ef3249b26a7e9dceba35fe1f
1 file changed