[automerger skipped] AIDL bufferpool implementation (just copy from HIDL impl) am: 97e1dfb99d am: d0e142bc3d -s ours am: 80a2fc5a51 -s ours am: 31491ee922 -s ours

am skip reason: Merged-In I48841189a8743dcd6533a9e61581e48f0f1717f1 with SHA-1 8fc3ca470d is already in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2680937

Change-Id: I255123d41d52596e07932754eb62f0e39da64c3e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>