test(e2e, emulator): correctly handle exit in non-ci environments

[mikehardy]

Description

Last script edit was perfect for CI but did not get the non-CI case correct, so it would re-spawn after exit

Now in non-CI environments it will correctly exit when the emulator is done

Related issues

Original commit was in PR #5335

Release Summary

conventional commit

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

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