[LSC] Add LOCAL_LICENSE_KINDS to external/libbackup am: aeba4c0b8e

Original change: https://android-review.googlesource.com/c/platform/external/libbackup/+/1588863

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ifed632f6c1bbed17edeaf0aac3c6264bee579bf1