Migration from NonConsumableItem to LifeTimeVG.

Migrating ownership over previously purchased NonConsumableItems to existing LifeTimeVGs defined in IStoreAssets implementation.
Migration alignment with iOS
Revert initializeFromDB to public, and call checkMetadataVersion inside it
New AndroidStore.jar
Merge branch 'master' into noncons_migration

* master:
  updated core project
  Update README.md
Refactored getMigrationIndicator to isMifrationRequired
Merge branch 'noncons_migration'

* noncons_migration:
  Refactored getMigrationIndicator to isMifrationRequired
  New AndroidStore.jar
  Revert initializeFromDB to public, and call checkMetadataVersion inside it
  Migration alignment with iOS
  Migration from NonConsumableItem to LifeTimeVG.