Override relevant location settings when an Emergency call is placed.

[pingu-the-penguin]

Inspired by: https://discuss.grapheneos.org/d/22208-location-services-for-emergency-calls/10

It does not enable any location tracking and doesn't change settings like SUPL, PSDS or network location. We could add the option of automatically enabling those 3 things for emergency calls, at least temporarily, but it doesn't exist right now.