feat: add user, system certificate in existing network security config

[swngarg-lt]

With -n flag:
Current flow: creates a new network_security_config and updates in manifest
Updated flow: check if network_security_config exist, if not, create a new one (current approach) else modify network_security_config to add certificate without losing other rules added by user. i.e whitelisting any domain.

[swngarg-lt]

@iBotPeaches Can you review this?

[iBotPeaches]

Its only been 5 minutes lol. I can't work that fast.

[iBotPeaches]

cc @erev0s as you added this feature. In case you have any feedback/comments on this addition.

[erev0s]

thanks @iBotPeaches for the tag to check it.
@swngarg-lt nice improvement to cover the cases when you want to keep any existing network configuration. At this point I do not have the time to properly go through it and test for any edge cases, from a quick look it seems fine.

[swngarg-lt]

thanks @iBotPeaches for the tag to check it. @swngarg-lt nice improvement to cover the cases when you want to keep any existing network configuration. At this point I do not have the time to properly go through it and test for any edge cases, from a quick look it seems fine.

So, @iBotPeaches @erev0s what can be the next action here?

[iBotPeaches]

thanks!