Fix device labels missing from run tabs on IntelliJ 2025.3+ (#8796)

## Summary

- Fix `IllegalAccessException` that silently prevents device names from
appearing in Run/Debug tab titles on IntelliJ 2025.3 (Android Studio
Panda)
- Use `RunContentDescriptor.setDisplayName()` API instead of reaching
into a private field's internal type

Fixes #8795

## Problem

In IntelliJ 2025.3, the `myDisplayNameView` field on
`RunContentDescriptor` changed from `MutableReactiveProperty` (a public
class) to `MutableStateFlow` (whose runtime class `StateFlowImpl` is
package-private). The existing reflection code calls `Method.invoke()`
on the `setValue` method found via `getMethod()`, which throws
`IllegalAccessException` when the declaring class is not accessible —
even though the method itself is public. The exception is caught
silently, so run tabs show "main.dart" instead of "main.dart (macOS)".

Regression introduced by
[JetBrains/intellij-community@`aaa88849ba4c`](JetBrains/intellij-community@aaa8884)
(Jul 14, 2025).

## Fix

Replace the field-level reflection
(`getDeclaredField("myDisplayNameView")` → `getMethod("setValue")` →
`invoke()`) with a call to `RunContentDescriptor.setDisplayName()`, an
existing protected method on `RunContentDescriptor`. This calls a stable
API method on a public class rather than depending on the internal type
of a private field.

An alternative minimal fix would be to add
`setValueMethod.setAccessible(true)` before the existing `invoke()`
call, but calling a stable API method on a public class is more
resilient than depending on the internal type of a private field.

## Before & After

### Before fix
<img width="293" height="116" alt="Screenshot 2026-02-15 at 2 53 56 PM"
src="https://github.com/user-attachments/assets/61f7d727-871a-438b-9735-7f51fc5a743e"
/>


### After fix:
<img width="321" height="128" alt="Screenshot 2026-02-15 at 2 52 38 PM"
src="https://github.com/user-attachments/assets/efa559a1-1fa2-4d37-a94a-bdf9b544bf67"
/>

---

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

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Author: lukemmtt

src/io/flutter/run/LaunchState.java

@@ -55,7 +55,6 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
@@ -171,16 +170,12 @@ protected RunContentDescriptor launch(@NotNull ExecutionEnvironment env) throws
     final String nameWithDeviceName = descriptor.getDisplayName() + " (" + device.deviceName() + ")";
 
     try {
-      // There is no public way to set display name so we resort to reflection.
-      final Field f = descriptor.getClass().getDeclaredField("myDisplayNameView");
-      f.setAccessible(true);
-      Object viewInstance = f.get(descriptor);
-      if (viewInstance != null) {
-        final Method setValueMethod = viewInstance.getClass().getMethod("setValue", Object.class);
-        setValueMethod.invoke(viewInstance, nameWithDeviceName);
-      }
+      // RunContentDescriptor.setDisplayName() is protected, so we use reflection to call it.
+      final Method setDisplayName = RunContentDescriptor.class.getDeclaredMethod("setDisplayName", String.class);
+      setDisplayName.setAccessible(true);
+      setDisplayName.invoke(descriptor, nameWithDeviceName);
     }
-    catch (IllegalAccessException | InvocationTargetException | NoSuchFieldException | NoSuchMethodException e) {
+    catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
       FlutterUtils.info(LOG, "Error setting display name", e, true);
     }