Frameworks/base: OtaDexopt needs to move artifacts on boot

Make OtaDexoptService a bootstrap service. It needs to start
immediately after the PackageManagerService so that it can move
A/B artifacts into their new place.

Add a method to Installer for the move.

Bug: 25612095
Change-Id: Idcf759b3c947088b416d54d2fa269ef27daf93ab
4 files changed