107843de45
This moves the interface closer to android::Canvas. The only use of return values was in the OpenGLRenderer subclass; that is replaced with an internal dirty flag: returned from finish(), checked by CanvasContext. This is part of a series of CLs to refactor the Graphics JNI bindings. BUG:15672762 R=djsollen@google.com,ccraik@google.com Change-Id: Ifd533eb8839a254b0d3a5d04fc5a2905afdfc89e