RESTRICT AUTOMERGE: Deflake LocationInWindowTests & DisplayCutoutTests

- These tests fail when running the entire class because of timing
  issue.
- Wait for device idle before running every test.

Fix: 330749613
Test: atest LocationInWindowTests
Test: atest DisplayCutoutTests
Change-Id: I40cff5032cded81e8338b6ff7dec13e604826037
2 files changed