Move register listener after boot completed am: da6883c9e5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Wifi/+/24316278

Change-Id: Id05375553adc137947f73b30efdbd9bc6e10f169
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>