cros_gralloc: Remove Android.bp files

Android.bp files are maintained in the AOSP fork repository.

Change-Id: I492e0c2154b22cd4cda85e379df2578b352c23df
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/4961034
Commit-Queue: Jason Macnak <natsu@google.com>
Reviewed-by: Dominik Behr <dbehr@chromium.org>
Reviewed-by: Jason Macnak <natsu@google.com>
2 files changed