Merge "Expose systemReady for SystemServer" am: 33737f6ac4 am: 7d2c52067f

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

Change-Id: Ic700e27e679a1f56b69ef082d4f5c7f5d12f8b6e
tree: b87c883f10c523d5da466b833555e7519476b66a
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS