Keystore's begin operation now requires parameters which describe the operation (e.g., algorithm, block mode, padding). This adjusts KeyStoreTest to provide the necessary parameters. (cherry-picked from commit c5e4d7af22793072a2620805f5e0e23bf15e7110) Bug: 19509156 Change-Id: Ibc665fbc893766a683a4aadc97a64ffdf2d0d85f