[DO NOT MERGE] Reject non-ASCII hostnames and SANs. am: c247f14ad5

Original change: https://googleplex-android-review.googlesource.com/c/platform/libcore/+/13163676

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Idaf0476b7dcb42975160ac2f05c875b7dc08bc8b