Add API of isOatArtifactDeletionEnabled for system apps

The interface of `isOatArtifactDeletionEnabled` is only available on internal system server. As request from ART service, it should be an open API available in system apps, for logic of `canOptimizePackage` and other purposes.

Bug: 229203212
Test: atest AppHibernationIntegrationTest

Change-Id: I195fdddcce2451e230414ce1a02202e9f8c6af19