[CQ] fix visibility scope of leaked classes (flutter#8219)

These classes are exposed but not available outside their visibility
scopes. The APIs exposing them seem reasonable but if we revisit them we
can always make these classes (more) private again.


![image](https://github.com/user-attachments/assets/8dcd2cdb-47cb-4d48-96fb-4d12b8800d04)


---

- [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/run/test/TestLaunchState.java

@@ -37,7 +37,7 @@
 /**
  * A launcher that starts a process to run flutter tests, created from a run configuration.
  */
-class TestLaunchState extends CommandLineState {
+public class TestLaunchState extends CommandLineState {
   @NotNull
   private final TestConfig config;
 

flutter-idea/src/io/flutter/view/EmbeddedBrowser.java

@@ -32,18 +32,19 @@
 import java.util.function.Consumer;
 import java.util.function.Function;
 
-class BrowserTab {
-  protected EmbeddedTab embeddedTab;
-  protected Content content;
-  protected CompletableFuture<DevToolsUrl> devToolsUrlFuture;
-  public ContentManager contentManager;
-}
 
 /**
  * There is one instance of embedded browser across the project, but it manages tabs across multiple tool
  * windows. Each tab can display contents of an independent URL.
  */
 public abstract class EmbeddedBrowser {
+  static public class BrowserTab {
+    protected EmbeddedTab embeddedTab;
+    protected Content content;
+    protected CompletableFuture<DevToolsUrl> devToolsUrlFuture;
+    public ContentManager contentManager;
+  }
+
   public static final String ANALYTICS_CATEGORY = "embedded-browser";
 
   protected final Map<@NotNull String, Map<@NotNull String, @NotNull BrowserTab>> windows = new HashMap<>();

flutter-idea/src/io/flutter/vmService/frame/DartVmServiceValue.java

@@ -532,7 +532,8 @@ private void addFields(@NotNull final XCompositeNode node, @Nullable final Eleme
             final String n;
             if (name instanceof String) {
               n = (String)name;
-            } else {
+            }
+            else {
               n = "$" + (int)name;
             }
             childrenList.add(new DartVmServiceValue(myDebugProcess, myIsolateId, n, value, null, null, false));
@@ -599,7 +600,7 @@ public InstanceRef getInstanceRef() {
     return myInstanceRef;
   }
 
-  static class LocalVarSourceLocation {
+  public static class LocalVarSourceLocation {
     @NotNull private final ScriptRef myScriptRef;
     private final int myTokenPos;