Camera HALs: Promote device HAL v3.2

And deprecate older HALs.

Bug: 17445920
Change-Id: I37a5e53fda3c93080e37ec848f84c702a2c9120b
diff --git a/include/hardware/camera2.h b/include/hardware/camera2.h
index 5b182a8..d920d4b 100644
--- a/include/hardware/camera2.h
+++ b/include/hardware/camera2.h
@@ -23,9 +23,10 @@
 /**
  * Camera device HAL 2.1 [ CAMERA_DEVICE_API_VERSION_2_0, CAMERA_DEVICE_API_VERSION_2_1 ]
  *
- * EXPERIMENTAL.
+ * DEPRECATED. New devices should use Camera HAL v3.2 or newer.
  *
- * Supports the android.hardware.Camera APIs.
+ * Supports the android.hardware.Camera API, and the android.hardware.camera2
+ * API in legacy mode only.
  *
  * Camera devices that support this version of the HAL must return
  * CAMERA_DEVICE_API_VERSION_2_1 in camera_device_t.common.version and in