Merge "Remove empty Android.mk" into main am: 25cb5c3e5c

Original change: https://android-review.googlesource.com/c/platform/external/libvpx/+/2925650

Change-Id: I212066678e539df796dc583142ee5a38ab24db41
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>