Summary:
The appId field gets embedded into the certificate request, so flipper knows which app to provide the cert to.
In iOS this field is never used, so far, because the destination path uniquely identifies the app so this is redundant.
For physical iPhones however, knowing the bundle id lets you deploy files into the container, so we can use this value.
Reviewed By: passy
Differential Revision: D13000296
fbshipit-source-id: 9f21850b908a03f1be87dc204e59d616150cc7ec
c76b524907