* Rewrite the CallService's incoming push handling to async
* Revert "Rewrite the CallService's incoming push handling to async"
* Make sure to call the completion blocks on all branches after delivering incoming pushes
Fixes `Killing app because it never posted an incoming call to the system after receiving a PushKit VoIP push` crashes
Initially tried replacing the callback based API with the async one but notifications stopped coming in. See associated PR for commits and details.
9c256d4598