drm_hwcomposer: Reformat using clang-format-5.0

Run the new clang-format style over the codebase to make things
compatible.

Change-Id: I267d5070929aaa7965d58655da841402debdcb6c
Signed-off-by: Sean Paul <seanpaul@chromium.org>
diff --git a/drmdisplaycomposition.h b/drmdisplaycomposition.h
index 078bf9b..2a5b1a4 100644
--- a/drmdisplaycomposition.h
+++ b/drmdisplaycomposition.h
@@ -193,6 +193,6 @@
 
   uint64_t frame_no_ = 0;
 };
-}
+}  // namespace android
 
 #endif  // ANDROID_DRM_DISPLAY_COMPOSITION_H_