Change the framework to use the new camera preview path.

This change makes the camera HAL interface take an ANativeWindow interface from
which all the camera preview buffers will be allocated.  The framework code
running in application processes now passes a Surface object rather than an
ISurface to the camera server via Binder when setting the preview surface.  The
camera server then forwards that Surface object (which implements the
ANativeWindow interface) to the camera HAL, which uses it to communicate with
SurfaceFlinger to allocate the camera preview buffers.

Change-Id: Ie438f721559cd7de5e4f848a26d96360dda07b5f
diff --git a/include/camera/CameraHardwareInterface.h b/include/camera/CameraHardwareInterface.h
index 6a66e3c..515d879 100644
--- a/include/camera/CameraHardwareInterface.h
+++ b/include/camera/CameraHardwareInterface.h
@@ -18,6 +18,7 @@
 #define ANDROID_HARDWARE_CAMERA_HARDWARE_INTERFACE_H
 
 #include <binder/IMemory.h>
+#include <ui/egl/android_natives.h>
 #include <utils/RefBase.h>
 #include <surfaceflinger/ISurface.h>
 #include <camera/Camera.h>
@@ -86,8 +87,8 @@
 public:
     virtual ~CameraHardwareInterface() { }
 
-    /** Return the IMemoryHeap for the preview image heap */
-    virtual sp<IMemoryHeap>         getPreviewHeap() const = 0;
+    /** Set the ISurface from which the preview buffers should be dequeued */
+    virtual status_t setPreviewWindow(const sp<ANativeWindow>& buf) = 0;
 
     /** Return the IMemoryHeap for the raw image heap */
     virtual sp<IMemoryHeap>         getRawHeap() const = 0;