For external images which can be accessed by CPU,
the tiling mode should be linear. So, query the usage
of the Android Hardware Buffer and derive the tiling
mode based on AHB usage flags.

Bug: angleproject:4735
Change-Id: I1b91c6800d414d73091032e40d8e4f1e8f6c101b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2241780
Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>