tree 961f13bbd9097b48d4b72978f31748cbf2fbb8c9
parent 6498f962836ff75d55510fbe0d8ddfd3c5f5dc34
author Geoffrey Pitsch <gpitsch@google.com> 1500909861 -0400
committer Geoffrey Pitsch <gpitsch@google.com> 1501079222 -0400

Remove ability to downgrade importance of existing channel.

Test: runtest systemui-notification
Bug: 63920384
Change-Id: Ic9f5c50c3d2a36ccd4ba9686dad1eb415b559215