[image-picker] configure privacy permissions on ios

Summary: This preliminary diff configures the necessary permissions for expo-image-picker. This one permission, NSMicrophoneUsageDescription is required for iOS devices as expo-image-picker allows users to create new media. I give more detail in this linear task (https://linear.app/comm/issue/ENG-2559/permission-configurations-for-iosandroid)

Test Plan: Build succeeds. Run succeeds.

Reviewers: atul, ashoat

Reviewed By: ashoat

Subscribers: tomek, ashoat

Differential Revision: https://phab.comm.dev/D6188