Update APK

[pzmarzly]

APK from rmst/yoke-android@37b01747c

Closes #48 Closes #52

For future reference, the steps I did:

• download Android Studio 4.0 from Jetbrains Toolbox
• open Tools->SDK Manager
• install Android 9 SDK from "SDK platforms"
• on "SDK Tools" check "Show Package Details", and install Build-Tools v28.0.3
• reload Android Studio and build the app

[pzmarzly]

I'm going to merge it, see how it goes, and eventually revert.