Adding METADATA file to selinux am: 5f377c52fa

Original change: https://android-review.googlesource.com/c/platform/external/selinux/+/2441187

Change-Id: Ia7bc8cd4bff23d3a278d751eebfeecdc8c9e5144
Signed-off-by: Automerger Merge Worker <[email protected]>