Settings: add a new Location off footer string

If the location is off and the device is not TELEPHONY or MESSAGING, the
device cannot contact emergency responder. The shown string should
reflect that.

Bug: 397454540
Flag: EXEMPT bugfix
Test: atest LocationSettingsFooterPreferenceControllerTest
Change-Id: Ie353eaa928a3b3708181fcdaf18d3cdbd32c8f92