[FIR] Add transform declaration and companion to regular class

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/declarations/FirJavaClass.kt

@@ -77,7 +77,7 @@ class FirJavaClass @FirImplementationDetail internal constructor(
 
     override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirJavaClass {
         typeParameters.transformInplace(transformer, data)
-        declarations.transformInplace(transformer, data)
+        transformDeclarations(transformer, data)
         status = status.transformSingle(transformer, data)
         superTypeRefs.transformInplace(transformer, data)
         transformAnnotations(transformer, data)
@@ -97,6 +97,15 @@ class FirJavaClass @FirImplementationDetail internal constructor(
         annotations.transformInplace(transformer, data)
         return this
     }
+
+    override fun <D> transformDeclarations(transformer: FirTransformer<D>, data: D): FirJavaClass {
+        declarations.transformInplace(transformer, data)
+        return this
+    }
+
+    override fun <D> transformCompanionObject(transformer: FirTransformer<D>, data: D): FirJavaClass {
+        return this
+    }
 }
 
 @FirBuilderDsl