08d643e5eb
To enable multi-touch on a tethered device, allow a callback to be registered with the OpenGL renderer. On every frame, the framebuffer is read into system memory and provided to the callback, so it can be mirrored to the device. This change is co-dependent on Idae3b026d52ed8dd666cbcdc3f3af80175c90ad3 in external/qemu. Change-Id: I03c49bc55ed9e66ffb59462333181f77e7e46035