Remove unnecessary filegroup and change genrule to accomodate. am: 8baa786392 am: be5941c4a8 am: f99c7f354b am: d81f699a07

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

Change-Id: Ife17a23503d33878f7313e69b940de37638f2317
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>