Merge "Add @Platinum and @Ignore to DemotingTestWithoutBugDetector linter." into tm-qpr-dev am: 7261d7569c am: 16758a870f

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

Change-Id: I0952a11206b2f81f13d125ffc06d615f6721215f
Signed-off-by: Automerger Merge Worker <[email protected]>