Remove file Android.mk. am: b25f9764fe

Original change: https://android-review.googlesource.com/c/device/generic/uml/+/3043052

Change-Id: I0de2cece688175c173b94a0fc3bbec87f383171c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>