commit 7ebcd66d725d7c82adc7632c8b31c1b19ecb42e5
author Bo Zhu <bozhu@google.com> Fri Jan 04 17:00:58 2019 -0800
committer Bo Zhu <bozhu@google.com> Fri Jan 18 21:08:23 2019 +0000
tree 519446dfab41ae9316b0f8fffeb92358af738e82
parent 41561126ef5370a476e7674694b8176111c43f1a

Add the actual implementation changes for the new metadata field for
recoverable key

The metadata, if given, will be authenticated (but unencrypted) together
with the key material when the key is uploaded to cloud.

Bug: 112191661
Test: atest FrameworksCoreTests:android.security.keystore.recovery
      atest FrameworksServicesTests:com.android.server.locksettings.recoverablekeystore
      atest -m RecoveryControllerHostTest RecoverableKeyStoreEndtoEndHostTest RecoverySessionHostTest

Change-Id: Ib62557d5ebd2bd7d206c04cf73c1dabb65882e49