If not set, it falls back to the original paths:
* `$(USERHOME)/AppData/Local/Android/Sdk` on Windows
* `$(HOME)/Library/Android/sdk` on MacOS
* `/opt/AndroidSDK` on Linux
This allows users to dictate which SDK root they'd like to use without making
local modifications.
- Multiplayer support
- Updated weapon offsets with SkillFur's latest values
- APK contains and copies the glsl shader files now (no need to copy them separately)