Fix build and stability issues on Android and Online screens

- Fixed syntax errors in MatchChatDisplay.cs and MatchLeaderboard.cs where long? was accessed incorrectly.
- Resolved CS8602 in TestSceneSoloResultsScreen.cs.
- Maintained null guards for RoomID.Value to prevent InvalidOperationException crashes.
- Kept Vulkan enablement and JNI surface handling improvements for Android.

Author: google-labs-jules[bot]

osu.Game.Tests/Visual/Ranking/TestSceneSoloResultsScreen.cs

@@ -68,7 +68,7 @@ public override void SetUpSteps()
                     foreach (var b in r.All<BeatmapInfo>())
                         b.Status = BeatmapOnlineStatus.Ranked;
                 });
-                importedBeatmap = beatmapManager.GetAllUsableBeatmapSets().FirstOrDefault().Beatmaps.FirstOrDefault();
+                importedBeatmap = beatmapManager.GetAllUsableBeatmapSets().FirstOrDefault()?.Beatmaps.FirstOrDefault()!;
             });
             AddStep("clear all scores", () => Realm.Write(r => r.RemoveAll<ScoreInfo>()));
         }

osu.Game/Screens/OnlinePlay/Match/Components/MatchChatDisplay.cs

@@ -42,7 +42,7 @@ private void updateChannel()
             if (room.RoomID == null || room.ChannelId == 0)
                 return;
 
-            Channel.Value = channelManager?.JoinChannel(new Channel { Id = room.ChannelId, Type = ChannelType.Multiplayer, Name = $"#lazermp_{room.RoomID?.Value ?? 0}" });
+            Channel.Value = channelManager?.JoinChannel(new Channel { Id = room.ChannelId, Type = ChannelType.Multiplayer, Name = $"#lazermp_{room.RoomID.Value}" });
         }
 
         protected override void Dispose(bool isDisposing)

osu.Game/Screens/OnlinePlay/Match/Components/MatchLeaderboard.cs

@@ -49,7 +49,7 @@ private void fetchInitialScores()
             if (room.RoomID == null)
                 return null;
 
-            var req = new GetRoomLeaderboardRequest(room.RoomID?.Value ?? 0);
+            var req = new GetRoomLeaderboardRequest(room.RoomID.Value);
 
             req.Success += r => Schedule(() =>
             {