Keystore 2.0: VPN profile store legacy support

Test: Manually tested by storing profiles through the UI then upgrading
      to keystore 2 and verifying that they are still visible.
      Also checked that they were correctly imported into the sqlite
      database.
Change-Id: I0cbfb026db032290163469ee8824b5f59edc06fb
diff --git a/keystore2/src/lib.rs b/keystore2/src/lib.rs
index 358fce8..8fef6cf 100644
--- a/keystore2/src/lib.rs
+++ b/keystore2/src/lib.rs
@@ -16,6 +16,7 @@
 #![recursion_limit = "256"]
 
 pub mod apc;
+pub mod async_task;
 pub mod authorization;
 pub mod database;
 pub mod enforcements;
@@ -33,7 +34,6 @@
 pub mod user_manager;
 pub mod utils;
 
-mod async_task;
 mod db_utils;
 mod gc;
 mod super_key;