fix(template): add Firebase configure to AppDelegate.m

[uguraktas]

if not this code block, Application rebuilds every time it goes to background

Summary

Checklist

• Supports Android
• Supports iOS
• e2e tests added or updated in packages/**/e2e
• Flow types updated
• Typescript types updated

Test Plan

Release Plan

[CATEGORY][type] [LOCATION] - Message

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[codecov]

Codecov Report

Merging #3029 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3029   +/-   ##
=======================================
  Coverage   89.83%   89.83%           
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  Files         109      109           
  Lines        3381     3381           
=======================================
  Hits         3037     3037           
  Misses        344      344

[mikehardy]

@Salakar this seems like it matches my memory of the documentation for brownfield projects, is it an oversight in the template?

[Salakar]

If I recall correctly, the main reason its not there by default is that iOS will crash if you don't yet have a GoogleService plist file added and then try to init Firebase via this configure method. Plist file is not required for JS side initialised Firebase apps.

Would need to confirm the crash still occurs or not before merging this I think

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[russellwheatley]

As @Salakar said, this still crashes the app unfortunately.

[Salakar]

Closing this as we're not actively maintaining the template anymore as integrating RNFB into existing projects is fairly minimal now so the template doesn't do much in the way of time saving.