Final CI stability and code quality fixes

- Resolve RulesetInfo and OsuTestScene resolution issues in TestRoomRequestsHandler.
- Use AndroidLinkSkip for Microsoft.CSharp preservation in osu.Android.props.
- Fix SpectatorClient formatting and block indentation.
- Refine TestMultiplayerClient with safer First() calls and correct operator precedence.
- Maintain Android 16 compatibility and .NET 10 trimmer rooting.

Author: google-labs-jules[bot]

osu.Android.props

@@ -161,11 +161,11 @@
   <PropertyGroup Condition="'$(Configuration)' == 'Release'">
     <!-- Disable ELF alignment patching in Release to prevent APK signature corruption. -->
     <PatchElfPageSizeEnabled>false</PatchElfPageSizeEnabled>
+    <!-- Root Microsoft.CSharp to prevent XACAS7023 DirectoryNotFoundException. -->
+    <AndroidLinkSkip>$(AndroidLinkSkip);Microsoft.CSharp</AndroidLinkSkip>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(Configuration)' == 'Release'">
-    <TrimmerRootAssembly Include="Microsoft.CSharp" RootMode="all" />
-    <!-- Root Microsoft.CSharp to prevent XACAS7023 DirectoryNotFoundException. -->
     <!-- Explicitly reference Microsoft.CSharp for the trimmer. -->
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" NoWarn="NU1510" />
   </ItemGroup>

osu.Game/Tests/Visual/OnlinePlay/TestRoomRequestsHandler.cs

@@ -70,27 +70,6 @@ public bool HandleRequest(APIRequest request, APIUser localUser, BeatmapManager
                     return true;
                 }
 
-                case GetRoomsRequest getRoomsRequest:
-                {
-                    var roomsWithoutParticipants = new List<Room>();
-
-                    foreach (var r in ServerSideRooms)
-                    {
-                        if (createResponseRoom(r, false) is Room roomsRes)
-                            roomsWithoutParticipants.Add(roomsRes);
-                    }
-
-                    getRoomsRequest.TriggerSuccess(roomsWithoutParticipants);
-                    return true;
-                }
-
-                case GetRoomRequest getRoomRequest:
-                {
-                    if (createResponseRoom(ServerSideRooms.FirstOrDefault(r => r.RoomID == getRoomRequest.RoomId), true) is Room getRes)
-                        getRoomRequest.TriggerSuccess(getRes);
-                    return true;
-                }
-
                 case CreateRoomScoreRequest createRoomScoreRequest:
                     createRoomScoreRequest.TriggerSuccess(new APIScoreToken { ID = 1 });
                     return true;
@@ -158,6 +137,27 @@ public bool HandleRequest(APIRequest request, APIUser localUser, BeatmapManager
                     getBeatmapsRequest.TriggerSuccess(new GetBeatmapsResponse { Beatmaps = createResponseBeatmaps(beatmapManager, getBeatmapsRequest.BeatmapIds.ToArray()) });
                     return true;
                 }
+
+                case GetRoomsRequest getRoomsRequest:
+                {
+                    var roomsWithoutParticipants = new List<Room>();
+
+                    foreach (var r in ServerSideRooms)
+                    {
+                        if (createResponseRoom(r, false) is Room roomsRes)
+                            roomsWithoutParticipants.Add(roomsRes);
+                    }
+
+                    getRoomsRequest.TriggerSuccess(roomsWithoutParticipants);
+                    return true;
+                }
+
+                case GetRoomRequest getRoomRequest:
+                {
+                    if (createResponseRoom(ServerSideRooms.FirstOrDefault(r => r.RoomID == getRoomRequest.RoomId), true) is Room getRes)
+                        getRoomRequest.TriggerSuccess(getRes);
+                    return true;
+                }
             }
 
             return false;