Add small timeout for DeviceConfig changes to propagate am: 110ad7a33a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Scheduling/+/15235282

Change-Id: Ibfb2654ffad6f0b312e93e7ae4f8b8af9173da87
tree: 6247127dee58318c17444346d0d19c508e00ea3e
  1. apex/
  2. framework/
  3. service/
  4. tests/
  5. OWNERS
  6. PREUPLOAD.cfg