Merge "Add encryption convenience methods to KeystoreClient."
am: e01125c8a9

* commit 'e01125c8a96e35e22783fcb73fdcaa7f129463c0':
  Add encryption convenience methods to KeystoreClient.
tree: 2a6e7b1e61c7ebd24dc805697d70b4ed2062908e
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/