Add dirgroup for trusty genrule am: 39ecf94f69 am: 82a8507602

Original change: https://android-review.googlesource.com/c/platform/system/gatekeeper/+/3304020

Change-Id: I5b4347d4ee4ad92714f31a8ba17ce449db4f1956
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>