Prepare to make SubscriptionManager public.

Sync SubscriptionManager and its dependentes between lmp-dev
and lmp-sprout-dev.

In SubscriptionController
-Rename getActivatedSubInfoList to getActiveSubInfoList.
-Remove @param context in java docs
-Cleanup

In SubInfoRecordUpdater
-Cleanup

Change-Id: Ie06ced3e7ff5a3d06b3b47892fed22b4bb8972c7