Extending AImage/AImageReader headers

This introduces new API that allows AHardwareBuffer access via
AImage/AImageReader.

Bug: 35114769
Test: Build (should have no functional change from headers change), and
existing CTS tests run using cts-tradefed on a Pixel.

Change-Id: I7b6505ca3b9489d86eb564d1ae5707fd3fa25668
2 files changed