egui Android Demo

This is my attempt at getting latest version of the egui demo to work on Android.

Optimized for size the resulting egui-android-demo.aab is 2.4M.

Built using xbuild

Building

x build --arch arm64 --platform android

Running

x run --device <DEVICE>

Example

$ x devices
host                                              Linux               linux x64           Arch Linux 6.6.2-arch1-1
adb:d535946                                       OnePlus5T           android arm64       Android 10 (API 29)
$ x run --device adb:d535946