Merge "Add @Platinum and @Ignore to DemotingTestWithoutBugDetector linter." into tm-qpr-dev am: 7261d7569c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21779360

Change-Id: I832778c0a4da4c1ae6be34810e5857acb0e96bc3
Signed-off-by: Automerger Merge Worker <[email protected]>