Reject non-ASCII hostnames and SANs. am: 650e71cc3a am: cad6f31431 am: edd6100b74

Original change: https://googleplex-android-review.googlesource.com/c/platform/libcore/+/13163680

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I263e91bcc0ab1eccdd3da0d81e3345b15be3ad55