Set device_id and settings_json from MDM

[lognaturel]

Some users manage their device fleets with Microsoft Intune, TinyMDM and other mobile device management solutions.

We've had request to set the device id and full settings from MDM.

These values should be updated at app launch and any time the settings are changed on the MDM system.

For full settings, we can use a JSON string following the settings format.

• Given that Collect is running and managed by MDM
  When I change the device_id key in my MDM system
  Then I should see that reflected next time I look at the settings or access deviceid from a form

• Given that Collect is running and managed by MDM
  When I change the settings_json key in my MDM system and those settings are invalid
  Then nothing should happen in Collect

• Given that Collect is running and managed by MDM
  When I change the settings_json key in my MDM system and those settings include a URL+username combination that matches an existing project
  Then that project should be updated to match the settings pushed by MDM

• Given that Collect is running and managed by MDM
  When I change the settings_json key in my MDM system and those settings include a URL+username combination that does NOT match an existing project
  Then a new project should be created with all of the settings I pushed

Pushing new settings should not change the active project.