Keystore 2.0: Fix diagnosing invalid key in CipherSpiBase.

Bug: 183101158
Test: atest CtsLibcoreTestCases:com.android.org.conscrypt.javax.crypto.CipherBasicsTest#testAeadEncryption

Change-Id: Idc9c7dc2614a47818227a06fe76078f72c0c1f57
1 file changed