Keystore 2.0: add field upgradedBlob to CreateOperationResponse

Add a nullable byte array "upgradedBlob" to CreateOperationResponse, so
that keystore2 can return an upgraded key blob (if one exists) on calls
to create_operation.

Bug: 173546754
Bug: 181910578
Change-Id: Ie97c510db888c161987ace017f9c6375237832ac
2 files changed