Remove unnecessary filegroup and change genrule to accomodate. am: 8baa786392 am: be5941c4a8

Original change: https://android-review.googlesource.com/c/platform/external/libcap/+/2139872

Change-Id: Iea9e264d4e00fd57c298968b18167126edae81d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>