Camera: Add unit test infrastructure for libcameraclient

Change-Id: I957538663ae8332d26f3640c63a75efc79f4ac5c
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index 31e20c5..b1c594a 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -166,6 +166,7 @@
                      callingPid);
                 return client;
             } else {
+                // TODOSC: need to support 1 regular client, multiple shared clients here
                 ALOGW("CameraService::connect X (pid %d) rejected (existing client).",
                       callingPid);
                 return NULL;