Merge from Widevine repo of http://go/wvgerrit/125263
and http://go/wvgerrit/135749
Define a |major.minor| version in the
serialization layer and check for compatibility
between REE and TEE before accepting connections.
bug: 158857733
test: opk_all_tests
Change-Id: Iad44a1f50a27c6bca4959c6d41c9b361712dbde8