[CQ] migrate off deprecated ModalityState.NON_MODAL (#8130)

The preferred access to this constant is now `ModalityState.nonModal()`.


![image](https://github.com/user-attachments/assets/959c641d-bbbf-4b20-a194-b99e6ca0e069)

---

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

<details>
  <summary>Contribution guidelines:</summary><br>

- See our [contributor
guide]([https://github.com/dart-lang/sdk/blob/main/CONTRIBUTING.md](https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview)
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Author: pq

flutter-idea/src/io/flutter/actions/AttachDebuggerAction.java

@@ -200,7 +200,7 @@ public void processTerminated(@NotNull String executorId,
   }
 
   private static void showSelectConfigDialog() {
-    ApplicationManager.getApplication().invokeLater(() -> new SelectConfigDialog().show(), ModalityState.NON_MODAL);
+    ApplicationManager.getApplication().invokeLater(() -> new SelectConfigDialog().show(), ModalityState.nonModal());
   }
 
   private static class SelectConfigDialog extends DialogWrapper {

flutter-idea/src/io/flutter/run/daemon/DeviceDaemon.java

@@ -246,7 +246,7 @@ else if (process.isProcessTerminated()) {
                 FlutterMessages.showError("Flutter device daemon", failureMessage, null);
               }
               else if (attempts == DeviceDaemon.RESTART_ATTEMPTS_BEFORE_WARNING + 4) {
-                ApplicationManager.getApplication().invokeLater(() -> new DaemonCrashReporter().show(), ModalityState.NON_MODAL);
+                ApplicationManager.getApplication().invokeLater(() -> new DaemonCrashReporter().show(), ModalityState.nonModal());
                 return null;
               }
             }

flutter-studio/src/io/flutter/android/AndroidModuleLibraryManager.java

@@ -99,7 +99,7 @@ public void update() {
   private Void scheduleAddAndroidLibraryDeps(@NotNull Project androidProject) {
     ApplicationManager.getApplication().invokeLater(
       () -> addAndroidLibraryDependencies(androidProject),
-      ModalityState.NON_MODAL);
+      ModalityState.nonModal());
     return null;
   }