Add lint baseline to address NewApi errors am: 9dbe0222c7 am: 861dcd6da0

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/systemui/+/1675571

Change-Id: I6efeaa656ad2178697d29c8189179825cd94cc2e
tree: 90974e8605ad489989b702f550b7f5318e0c23fe
  1. iconloaderlib/