Fix license header placement in OboeAudioBridge.cs and OsuGameActivity.cs

Agent-Logs-Url: https://github.com/winnerspiros/osu/sessions/b1c945ad-8cf2-4e12-832f-9afdfe84c4d5

Co-authored-by: winnerspiros <1675249+winnerspiros@users.noreply.github.com>

Author: Copilot

osu.Android/Native/OboeAudioBridge.cs

@@ -1,9 +1,9 @@
-using System.Runtime.CompilerServices;
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
 using System.Diagnostics;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using Debug = System.Diagnostics.Debug;
 

osu.Android/OsuGameActivity.cs

@@ -1,4 +1,3 @@
-using osu.Android.Input;
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.