Camera: Support BufferQueue between Camera and StageFright

Use a BufferQueue between Camera and StageFright to pass video
buffers for Camera HALv3 devices.

CameraSource in StageFright will try to use "buffer queue" mode
if it is supported by the camera device. In "buffer queue" mode,
CameraSource creates a buffer queue and a listener thread to recieve
video buffers from camera device. CameraSource then wraps the
ANWBuffer in MediaBuffer. If the camera device doesn't support
"buffer queue" mode, it falls back to "metadata in video buffer"
mode or "real YUV data" mode.

"Metadata in video buffer" mode is removed from Camera2Client and
only "buffer queue" mode is supported.

Bug: 24511454

Change-Id: Ice833b57bcd8d91852d6415402013f56f3e3970a