Fix -Wformat compiler warning

DisplayViewport.h:133:29: warning: format specifies type 'int' but the argument has type 'ui::Rotation' [-Wformat]

Test: presubmit
Change-Id: Ie656a3da47f2155b106014dff967d5b2d05998d9
diff --git a/include/input/DisplayViewport.h b/include/input/DisplayViewport.h
index 7457496..b0eceef 100644
--- a/include/input/DisplayViewport.h
+++ b/include/input/DisplayViewport.h
@@ -130,9 +130,9 @@
                             "isActive=[%d]",
                             ftl::enum_string(type).c_str(), displayId, uniqueId.c_str(),
                             physicalPort ? ftl::to_string(*physicalPort).c_str() : "<none>",
-                            orientation, logicalLeft, logicalTop, logicalRight, logicalBottom,
-                            physicalLeft, physicalTop, physicalRight, physicalBottom, deviceWidth,
-                            deviceHeight, isActive);
+                            static_cast<int>(orientation), logicalLeft, logicalTop, logicalRight,
+                            logicalBottom, physicalLeft, physicalTop, physicalRight, physicalBottom,
+                            deviceWidth, deviceHeight, isActive);
     }
 };