fix(core): preserve static class/styles on root component

Fix to preserve statically applied classes and styles on root component while using host binding.

Fixes angular#51460

packages/core/src/render3/node_manipulation.ts

@@ -1280,10 +1280,22 @@ export function setupStaticAttributes(renderer: Renderer, element: RElement, tNo
   }
 
   if (classes !== null) {
-    writeDirectClass(renderer, element, classes);
+    const elementClasses = element.className.split
+      ? (element.className
+          .split(' ')
+          .filter((item) => !classes.includes(item))
+          .join(' ') ?? '')
+      : '';
+    writeDirectClass(renderer, element, `${classes} ${elementClasses}`.trim());
   }
 
   if (styles !== null) {
-    writeDirectStyle(renderer, element, styles);
+    const elementStyles =
+      element
+        .getAttribute('style')
+        ?.split(';')
+        .filter((item) => !styles.includes(item))
+        .join(';') ?? '';
+    writeDirectStyle(renderer, element, `${styles} ${elementStyles}`.trim());
   }
 }