Merge "Remove unused Android.mk in NamespaceTest" into main am: 3cf2db8aef am: d2f3837de2 am: b691d6af7b

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

Change-Id: Iee1e0a598ba7994d513f707367c5ca6186c8f561
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>