Merge "Remove unused Android.mk in NamespaceTest" into main am: 3cf2db8aef

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2905929

Change-Id: I63a5f68d6a9062c96ee524a0c16ce1f2b517b5d9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>