Add sensitivity config popup for presenter plugin
This is my first merge request here so let me know what I can do better for next time.
Summary
Adds a menu item for the presenter plugin that can be used to configure the sensitivity.
Test Plan
The best way to test this is to run the app on a physical device (using an emulator would be hard since the plugin requires gyroscopic activity). I tested it on a Sony Z5 (Android 7.1.1, API level 25) and a Samsung Note 8 (Android 9.0, API level 28) without any issues or bugs.
Edited by Simon Redman