Android Mode 0255

Version 4.0-beta2 of the Android mode

Compatible with Processing 3.1+

Includes support for live wallpapers, watch faces, and Cardboard apps (with this library, needs to be installed manually)

##Changes:

• Added new permissions: #229
• Unified API to get context: #227
• Ported fixes from 3.0.1: #234
• Implemented permission handling for services: #235
• Use sketch.properties to store selected component: #222