“SimulatorTrampoline.xpc” would like to access the microphone

Question

This is part of Apple's fix for radar 45715977, where Simulator devices would prompt repeatedly to access the microphone (as often as every time your app was run). You can find a brief reference to the fix in the Xcode 10.2 release notes.

There are no references in your project because the prompt comes from part of Xcode itself; it's there so that your apps can use audio services in the Simulator, rather than having to be run on a device. I wouldn't worry about it.