[CQ] migrate off slated-for-removal DataContext functional interface (#8228)

The (neat) `DataContext` functional interface is slated to be removed.


![image](https://github.com/user-attachments/assets/dceb05c7-aa6a-4b20-bbd6-def43062e66e)

This migrates us to a `SimpleDataContext` builder which is the [new path
forward](https://github.com/JetBrains/intellij-community/blob/7b62c265ab76de3c80882525fdc4047895f3f4b1/platform/core-ui/src/openapi/actionSystem/DataContext.java#L18).

See: #7718


---

- [x] I’ve reviewed the contributor guide and applied the relevant
portions to this PR.

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Author: pq

flutter-idea/src/io/flutter/editor/NativeEditorNotificationProvider.java

@@ -6,6 +6,7 @@
 package io.flutter.editor;
 
 import com.intellij.openapi.actionSystem.*;
+import com.intellij.openapi.actionSystem.impl.SimpleDataContext;
 import com.intellij.openapi.fileEditor.FileEditor;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.SystemInfo;
@@ -143,15 +144,7 @@ private void performAction() {
     }
 
     private DataContext makeContext() {
-      return dataId -> {
-        if (CommonDataKeys.VIRTUAL_FILE.is(dataId)) {
-          return myFile;
-        }
-        if (CommonDataKeys.PROJECT.is(dataId)) {
-          return project;
-        }
-        return null;
-      };
+      return SimpleDataContext.builder().add(CommonDataKeys.VIRTUAL_FILE, myFile).add(CommonDataKeys.PROJECT, project).build();
     }
   }
 }