Decomission ControllerInfoProxy in favor of ControllerInfo.

This CL makes it possible to create a media3 ControllerInfo in test code, which is needed to test several aspects of a media3-based media app. It does this by exposing a test-only static factory method. This is a hacky low-effort approach; a better solution could be to split ControllerInfo up into a public interface that was exposed to client logic, and that they could extend, and a package-private implementation with internal fields like the callback. That's a much bigger change, however.

PiperOrigin-RevId: 491978830

libraries/session/src/main/java/androidx/media3/session/MediaSession.java

@@ -15,6 +15,7 @@
  */
 package androidx.media3.session;
 
+import static androidx.annotation.VisibleForTesting.PRIVATE;
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkNotNull;
 import static androidx.media3.common.util.Assertions.checkState;
@@ -502,6 +503,24 @@ public class MediaSession {
           /* cb= */ null,
           /* connectionHints= */ Bundle.EMPTY);
     }
+
+    // TODO(b/259546357): Remove when ControllerInfo can be instantiated cleanly in tests.
+    /** Returns a {@link ControllerInfo} suitable for use when testing client code. */
+    @VisibleForTesting(otherwise = PRIVATE)
+    public static ControllerInfo createTestOnlyControllerInfo(
+        RemoteUserInfo remoteUserInfo,
+        int libraryVersion,
+        int interfaceVersion,
+        boolean trusted,
+        Bundle connectionHints) {
+      return new MediaSession.ControllerInfo(
+          remoteUserInfo,
+          libraryVersion,
+          interfaceVersion,
+          trusted,
+          /* cb= */ null,
+          connectionHints);
+    }
   }
 
   private final MediaSessionImpl impl;