Add Android.bp and metadata files am: a7fe57ba4b am: 15cf791142 am: 95c68ac7e0

Original change: https://android-review.googlesource.com/c/platform/external/usrsctp/+/1353829

Change-Id: I6f9adf25f5034627c4b045cf8c0c0ad5922f94b2