CameraService: Notify camera service proxy of device status

Send the camera proxy service in system server updates to
camera device state: opened/closed/active/idle.

Bug: 23393557
Change-Id: Id7c70f134821efa34af8f6e7b4caa4c2ab128ebc
diff --git a/services/camera/libcameraservice/CameraService.h b/services/camera/libcameraservice/CameraService.h
index 7f4d43f..894767a 100644
--- a/services/camera/libcameraservice/CameraService.h
+++ b/services/camera/libcameraservice/CameraService.h
@@ -24,6 +24,7 @@
 #include <binder/BinderService.h>
 #include <binder/IAppOpsCallback.h>
 #include <camera/ICameraService.h>
+#include <camera/ICameraServiceProxy.h>
 #include <hardware/camera.h>
 
 #include <camera/ICamera.h>
@@ -164,6 +165,14 @@
     void                playSound(sound_kind kind);
     void                releaseSound();
 
+    /**
+     * Update the state of a given camera device (open/close/active/idle) with
+     * the camera proxy service in the system service
+     */
+    static void         updateProxyDeviceState(
+            ICameraServiceProxy::CameraState newState,
+            const String8& cameraId);
+
     /////////////////////////////////////////////////////////////////////
     // CameraDeviceFactory functionality
     int                 getDeviceVersion(int cameraId, int* facing = NULL);
@@ -728,6 +737,7 @@
 
     static String8 toString(std::set<userid_t> intSet);
 
+    static sp<ICameraServiceProxy> getCameraServiceProxy();
     static void pingCameraServiceProxy();
 
 };