Set minimum frame size to be 1 byte
Set minimum frame size to be 1 byte

The show_existing_frame mode still needs to be sent to the decoder.
Account for this as 1 byte. This would make the encoder properly
update its state.

Change-Id: I32a59ccb5d0e02cc6367c1a264b2de72dc1432a7

webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx