Fix warning: list conflicting ids (not cameraId)

Change-Id: Iad75866ab4edd500a32c5ca7e7c89d8af246f5d2
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index 3deb396..41d812b 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -2353,7 +2353,7 @@
                 result.appendFormat("  Resource Cost: %d\n", state.second->getCost());
                 result.appendFormat("  Conflicting Devices:");
                 for (auto& id : conflicting) {
-                    result.appendFormat(" %s", cameraId.string());
+                    result.appendFormat(" %s", id.string());
                 }
                 if (conflicting.size() == 0) {
                     result.appendFormat(" NONE");