Multi-threaded keystore

This patches changes the keystore to use the asychronous api model for
begin, update, finish, and abort.

Also removes unused class KeystoreArguments (aidl and implementation).

Test: Keystore CTS tests
Bug: 111443219

Change-Id: Icc6def9ff6dbe32193272d7d015079a006ebc430
34 files changed