Merge "Expose systemReady for SystemServer" am: 33737f6ac4

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1640142

Change-Id: I4680cd76d6e5c074e291bddcf1bd4bd3871365a1
tree: b87c883f10c523d5da466b833555e7519476b66a
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS