Detect and use 3D panel for 3D content. Use the virtual framebuffer
for 3D panel. Set position for overlay channels accordingly. Use
3D ioctl for line interleaving.
Add state machine for Overlay.
Change-Id: I28dc7ed99aed7ca2c53c93722c44279d9c7de9fc
Conflicts:
liboverlay/overlayLib.cpp
