Merge "Remove unused frameworks/base/Android.mk" into main am: 93673abba8

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3022944

Change-Id: I084f14f26579ad5928f8cf031da0aa0cef9436fb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>