Integrate IKeystoreAuthorization aidl's addAuthToken with Keystore SPI.

This CL introduces the Keystore SPI class for IKeystoreAuthorization
aidl interface and implements the calling code for addAuthToken method.

Bug: 166672367
Bug: 177830239
Bug: 177791435
Bug: 177787061
Bug: 177787180
Test: VTS test
Change-Id: I9f0adc97efadd0fa1a1f16dd5ec811f4151a2b03

keystore/java/android/security/KeyStore.java

@@ -996,6 +996,7 @@ public class KeyStore {
      */
     public int addAuthToken(byte[] authToken) {
         try {
+            new Authorization().addAuthToken(authToken);
             return mBinder.addAuthToken(authToken);
         } catch (RemoteException e) {
             Log.w(TAG, "Cannot connect to keystore", e);