Android Mode 0262

Version 4.0-beta9 of the Android mode

Compatible with Processing 3.1+

Changes & fixes

• VR API nearing completion: 13e2d9a, b1b055d, c886fd8, 1f6d205, 490fbb5,
  a706a8b
• Added some Activity methods to PApplet to maintain backwards compatibility: 72a9505
• Call the permission handling method in the main looper thread: 055d56b
• Handle null bitmap in loadImage(): #339
• Set pixelWidth/Height/Density of vessel in AsyncImageLoader: #340
• Implemented LINE_STRIP and LINE_LOOP in the Android2D renderer: 90b3e52
• Use current camera mode when setting eye transformation: 3e70df9
• Implement getMatrix(PMatrix2D) in PGraphics2D: 85890ad