tree de70e6b14fe6cc616161738df8a347d70a87a0c1
parent 4ef96d7909de155061acae750f9679611a1a87fc
author hkuang <hkuang@google.com> 1598809580 -0700
committer hkuang <hkuang@google.com> 1599026388 -0700

trancoding: Rework some API signature.

This is for addressing part of API counsel comments.

1. Remove AutoCloseable from MediaTranscodeManager.
2. Return job id in progress update callback.
3. Hide PRIORITY_OFFLINE.

Bug: 160260102
Test: Unit test
Change-Id: I7ae4d723a8f1b325ddc5fe7e81c49783adcbae19