docs(troubleshooting): suggest double-checking NetworkSecurityConfig if app won't load

[ace-n]

Description

This page provides a very helpful list of reasons why a Detox app might not load.

However, I managed to run into a new one! 😨

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Thanks to an errant git command, I mistakenly removed my network_security_config.xml file and the reference to it in AndroidManifest.xml. In the process, the app I was testing stopped loading on my physical Android device.

I confirmed this was the root cause by:

1. trying lots of other things that didn't work 🙃
2. restoring my Network Security Config
3. confirming that my app launched as expected 🎉

I thought I'd add this scenario to the list mentioned above, lest somebody else fall down the same rabbit hole. 🙂

[asafkorem]

Hey @ace-n, thanks. LGTM.