Track behavior change in default HostnameVerifier.

The default HostnameVerifier now ignores any CommonName
in the certificate provided by the server, even when no
subjectAltName is present.

Bug: 70278814
Test: CtsLibcoreTestCases (ran against an internal build
      with this CL cherrypicked)
Change-Id: Ib6fa0c40d8903352e88d8812bf0c09ec1d8ef6be
4 files changed