[Story] EX LLS: Check and prompt for location access at the very beginning

### Description

When the user selects _Location_ from the composer, the behaviour is driven by what’s the current access to the device’s location:
* No access - open the map with some arbitrary location.
* Ask - prompt the user for access.
* Some access - open the map with the current location.

When a user, Bob, opens the map because another user, Alice, shared her location:
* Show Bob's current location if there's access to location but do not request it if that is not the case.
* Request the location if Bob taps on the _Go to my location_ button on the map.

**Designs**:
* Select Location: [iOS](https://www.figma.com/design/GLTPPjxeU0qaszZQIoqdkI/ER-143--Live-Location-Sharing?node-id=158-9502&t=J1otoRQsQhMZkF2f-4) [Android](https://www.figma.com/design/GLTPPjxeU0qaszZQIoqdkI/ER-143--Live-Location-Sharing?node-id=58-13702&t=J1otoRQsQhMZkF2f-4)
* Prompt permissions: [iOS](https://www.figma.com/design/GLTPPjxeU0qaszZQIoqdkI/ER-143--Live-Location-Sharing?node-id=158-9780&t=J1otoRQsQhMZkF2f-4) [Android](https://www.figma.com/design/GLTPPjxeU0qaszZQIoqdkI/ER-143--Live-Location-Sharing?node-id=158-16681&t=J1otoRQsQhMZkF2f-4)
* Map without current location: [iOS](https://www.figma.com/design/GLTPPjxeU0qaszZQIoqdkI/ER-143--Live-Location-Sharing?node-id=158-9791&t=J1otoRQsQhMZkF2f-4) [Android](https://www.figma.com/design/GLTPPjxeU0qaszZQIoqdkI/ER-143--Live-Location-Sharing?node-id=158-16691&t=J1otoRQsQhMZkF2f-4)

# Acceptance criteria
- TBD

# Dependencies
- None

# Out of scope
- Nothing

# Questions
- [x] None

# Subtasks

### Android
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### iOS
-

### Rust
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### Other
-