Bug 1815758 - Reorder StaticProtocolHandler fields to improve padding r=xpcom-reviewers,nika

This saves 4 padding bytes.

Differential Revision: https://phabricator.services.mozilla.com/D169231

xpcom/components/StaticComponents.h

@@ -242,9 +242,9 @@ struct StaticProtocolHandler final {
   }
 
   StringOffset mScheme;
-  ModuleID mModuleID;
   uint32_t mProtocolFlags;
   int32_t mDefaultPort;
+  ModuleID mModuleID;
   bool mHasDynamicFlags;
 
   nsCString Scheme() const;