Suppress RescueParty when active USB connection.

When there is a very early system server runtime restart, we may not
yet have a published BatteryManagerInternal, so we need to go directly
to the "batteryproperties" native service to detect the USB state.

Test: builds, rescue is suppressed when USB is connected
Bug: 34872406
Change-Id: I949984cb95495c77de85ac322075177cff07b8b6