Add safety & regulatory info to "about device".

Renamed "Regulatory information" to "Regulatory labels"
and added a new option called "Safety & regulatory information".

The new option only shows if an activity exists that can
accept android.settings.SHOW_SAFETY_AND_REGULATORY_INFO intents.

BUG: 27876015
Change-Id: Iaf9588658eb7919b330ac8b3d673b8e81a4f76dc