Add tests for CipherSpi.updateAAD() and SSLEngine(String, int)

We added tests for the implementations in Conscrypt, but these test
the behavior of the underlying CipherSpi and SSLEngine classes
themselves.

Test: cts -m CtsLibcoreTestCases -t org.apache.harmony
Bug: 129008943
Change-Id: I2eecebdabfe34aafaacab4a974383becd8eed63e
2 files changed