Merge "Nullability check for capability module." am: fb63e485f1

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2537351

Change-Id: Ic4ea3715225ed0121ea349c840e53c63cd2b837f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>