Keystore 2.0: Add permissions and policy for user manager AIDL.

Bug: 176123105
Test: User can set a password and unlock the phone.
Change-Id: I96c033328eb360413e82e82c0c69210dea2ddac9
diff --git a/private/access_vectors b/private/access_vectors
index 1420360..a02a2a8 100644
--- a/private/access_vectors
+++ b/private/access_vectors
@@ -714,7 +714,10 @@
 class keystore2
 {
 	add_auth
+	change_password
+	change_user
 	clear_ns
+	clear_uid
 	get_state
 	list
 	lock