Slightly improve NavGraph.equals() performance

Small trick to avoid unnecessary checks
androidx/androidx@06f18f7

fragula-core/src/main/kotlin/com/fragula2/navigation/SwipeBackDestination.kt

@@ -47,6 +47,7 @@ class SwipeBackDestination constructor(
     }
 
     override fun equals(other: Any?): Boolean {
+        if (this === other) return true
         if (other == null || other !is SwipeBackDestination) return false
         return super.equals(other) && className == other.className
     }