Reinitialize token dependent components when a new one is provided

[LukasPaczos]

Closes #15063.

Changes in this PR:

• Throw a configuration exception when Mapbox services are accessed with an invalid access token, which previously resulted in a caught NPE and a blank map (Initializing Mapbox with a null or an invalid access token - unclear error #15063).
• Recreate telemetry service when a new, valid access token is supplied. From what I can see, we'd be sending telemetry events with a wrong token otherwise. If an invalid one/null is provided, telemetry will be stopped.
• Allow setting a null access token in the runtime, just like we allow during initialization.

[tobrun]

Looks great, thank you for cleaning this up and adding tests.
Will defer the review to @alfwatt as this also involves telemetry.