Merge "Do not post notification when system boot is not ready." into main am:...

Merge "Do not post notification when system boot is not ready." into main am: 7f16bfb5 am: 6e0a096b

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3464559



Change-Id: I3b286da4178de2bf91e5fb69f2b2ac667f0981fc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>