Add camera bayer image format.

The API are hidden.

bug:5086073

Change-Id: Ic9a53e5d5007ad3f12a28406ee25098227f14cbc
diff --git a/include/camera/CameraParameters.h b/include/camera/CameraParameters.h
index 48483fd..b661496 100644
--- a/include/camera/CameraParameters.h
+++ b/include/camera/CameraParameters.h
@@ -573,6 +573,9 @@
     static const char PIXEL_FORMAT_RGB565[];
     static const char PIXEL_FORMAT_RGBA8888[];
     static const char PIXEL_FORMAT_JPEG[];
+    // Raw bayer format used for images, which is 10 bit precision samples
+    // stored in 16 bit words. The filter pattern is RGGB.
+    static const char PIXEL_FORMAT_BAYER_RGGB[];
 
     // Values for focus mode settings.
     // Auto-focus mode. Applications should call