Don't require full screen on iOS

[Cyberbeni]

fixes #426
fixes #376

couldn't test it because the Expo Go app already supports split screen and couldn't figure out how to build the standalone app

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.21%. Comparing base (af44e42) to head (f206aa5).
Report is 20 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #430   +/-   ##
=======================================
  Coverage   60.21%   60.21%           
=======================================
  Files          46       46           
  Lines         945      945           
  Branches      189      189           
=======================================
  Hits          569      569           
  Misses        341      341           
  Partials       35       35           

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[thornbill]

I need to do some additional testing, but it doesn't seem like this is needed in the updated version of Expo.

[Cyberbeni]

If I remember correctly if a new enough Expo version is specified in some config file then it is not needed. But if a newer Expo version is used for building but the config is not updated then it is needed.
Or maybe the config part is not needed, I don't know.
But when downloading "Expo Go" from the App Store then requiresFullScreen is set to false for that application and the config for the in-development application doesn't matter.

[Cyberbeni]

According to my comments on this issue, either sdkVersion or requireFullScreen is needed in app.json: #426
The part I linked there is still unchanged in Expo's source code: /~https://github.com/expo/expo/blob/0a999ca61531f3064e589be623ff0d7f8247cebe/packages/%40expo/config-plugins/src/ios/RequiresFullScreen.ts#L23-L25