Make ACTION_SETTING_RESTORED SystemApi

Because Bluetooth is going mainline, we need to remove call to hidden
API.
Intent.ACTION_SETTING_RESTORED and extra are currently hidden.
There is no known alternative, so this CL make them SystemApi.

Bug: 211851706
Test: Build + start bt
Tag: #refactor
Change-Id: I7a105946f075819f21b91a39bc37c6e167439bf4