camera2: add reprocess support

Add support to create input stream, submit reprocess capture requests,
and receive reprocess capture results.

Change-Id: Iee2d4313f3d52616a484eaea7a28f5ef9d8a674b
diff --git a/services/camera/libcameraservice/device3/Camera3StreamInterface.h b/services/camera/libcameraservice/device3/Camera3StreamInterface.h
index da989cd..ea90dd9 100644
--- a/services/camera/libcameraservice/device3/Camera3StreamInterface.h
+++ b/services/camera/libcameraservice/device3/Camera3StreamInterface.h
@@ -128,6 +128,13 @@
     virtual status_t returnInputBuffer(const camera3_stream_buffer &buffer) = 0;
 
     /**
+     * Get the buffer producer of the input buffer queue.
+     *
+     * This method only applies to input streams.
+     */
+    virtual status_t getInputBufferProducer(sp<IGraphicBufferProducer> *producer) = 0;
+
+    /**
      * Whether any of the stream's buffers are currently in use by the HAL,
      * including buffers that have been returned but not yet had their
      * release fence signaled.