Android: Move InstallWAD to a new WiiUtils class

I'm trying to move away from dumping every native method
in NativeLibrary.

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/NativeLibrary.java

@@ -444,8 +444,6 @@ public final class NativeLibrary
 
   public static native void ReloadLoggerConfig();
 
-  public static native boolean InstallWAD(String file);
-
   public static native boolean ConvertDiscImage(String inPath, String outPath, int platform,
           int format, int blockSize, int compression, int compressionLevel, boolean scrub,
           CompressCallback callback);

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/ui/main/MainPresenter.java

@@ -13,7 +13,6 @@ import androidx.appcompat.app.AlertDialog;
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
 
 import org.dolphinemu.dolphinemu.BuildConfig;
-import org.dolphinemu.dolphinemu.NativeLibrary;
 import org.dolphinemu.dolphinemu.R;
 import org.dolphinemu.dolphinemu.features.settings.model.BooleanSetting;
 import org.dolphinemu.dolphinemu.features.settings.ui.MenuTag;
@@ -22,9 +21,9 @@ import org.dolphinemu.dolphinemu.services.GameFileCacheService;
 import org.dolphinemu.dolphinemu.utils.AfterDirectoryInitializationRunner;
 import org.dolphinemu.dolphinemu.utils.ContentHandler;
 import org.dolphinemu.dolphinemu.utils.FileBrowserHelper;
+import org.dolphinemu.dolphinemu.utils.WiiUtils;
 
 import java.util.Arrays;
-import java.util.Set;
 
 public final class MainPresenter
 {
@@ -162,7 +161,7 @@ public final class MainPresenter
 
     Thread installWADThread = new Thread(() ->
     {
-      if (NativeLibrary.InstallWAD(file))
+      if (WiiUtils.installWAD(file))
       {
         mainPresenterActivity.runOnUiThread(
                 () -> Toast.makeText(mContext, R.string.wad_install_success, Toast.LENGTH_SHORT)

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/WiiUtils.java

@@ -0,0 +1,6 @@
+package org.dolphinemu.dolphinemu.utils;
+
+public final class WiiUtils
+{
+  public static native boolean installWAD(String file);
+}

Source/Android/jni/CMakeLists.txt

@@ -5,6 +5,7 @@ add_library(main SHARED
   IniFile.cpp
   MainAndroid.cpp
   NativeConfig.cpp
+  WiiUtils.cpp
 )
 
 target_link_libraries(main

Source/Android/jni/MainAndroid.cpp

@@ -45,7 +45,6 @@
 #include "Core/PowerPC/PowerPC.h"
 #include "Core/PowerPC/Profiler.h"
 #include "Core/State.h"
-#include "Core/WiiUtils.h"
 
 #include "DiscIO/Blob.h"
 #include "DiscIO/Enums.h"
@@ -596,14 +595,6 @@ JNIEXPORT void JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_ReloadLogger
   Common::Log::LogManager::Init();
 }
 
-JNIEXPORT jboolean JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_InstallWAD(JNIEnv* env,
-                                                                                   jclass,
-                                                                                   jstring jFile)
-{
-  const std::string path = GetJString(env, jFile);
-  return static_cast<jboolean>(WiiUtils::InstallWAD(path));
-}
-
 JNIEXPORT jboolean JNICALL Java_org_dolphinemu_dolphinemu_NativeLibrary_ConvertDiscImage(
     JNIEnv* env, jclass, jstring jInPath, jstring jOutPath, jint jPlatform, jint jFormat,
     jint jBlockSize, jint jCompression, jint jCompressionLevel, jboolean jScrub, jobject jCallback)

Source/Android/jni/WiiUtils.cpp

@@ -0,0 +1,22 @@
+// Copyright 2021 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <string>
+
+#include <jni.h>
+
+#include "jni/AndroidCommon/AndroidCommon.h"
+
+#include "Core/WiiUtils.h"
+
+extern "C" {
+
+JNIEXPORT jboolean JNICALL Java_org_dolphinemu_dolphinemu_utils_WiiUtils_installWAD(JNIEnv* env,
+                                                                                    jclass,
+                                                                                    jstring jFile)
+{
+  const std::string path = GetJString(env, jFile);
+  return static_cast<jboolean>(WiiUtils::InstallWAD(path));
+}
+}