Android: Convert ReadOnlyCheat to Kotlin

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/model/ReadOnlyCheat.java

@@ -1,36 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.features.cheats.model;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-public abstract class ReadOnlyCheat implements Cheat
-{
-  private Runnable mChangedCallback = null;
-
-  public int trySet(@NonNull String name, @NonNull String creator, @NonNull String notes,
-          @NonNull String code)
-  {
-    throw new UnsupportedOperationException();
-  }
-
-  public void setEnabled(boolean enabled)
-  {
-    setEnabledImpl(enabled);
-    onChanged();
-  }
-
-  public void setChangedCallback(@Nullable Runnable callback)
-  {
-    mChangedCallback = callback;
-  }
-
-  protected void onChanged()
-  {
-    if (mChangedCallback != null)
-      mChangedCallback.run();
-  }
-
-  protected abstract void setEnabledImpl(boolean enabled);
-}

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/cheats/model/ReadOnlyCheat.kt

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.features.cheats.model
+
+abstract class ReadOnlyCheat : Cheat {
+    private var onChangedCallback: Runnable? = null
+
+    override fun setCheat(
+        name: String,
+        creator: String,
+        notes: String,
+        code: String
+    ): Int {
+        throw UnsupportedOperationException()
+    }
+
+    override fun setEnabled(isChecked: Boolean) {
+        setEnabledImpl(isChecked)
+        onChanged()
+    }
+
+    override fun setChangedCallback(callback: Runnable?) {
+        onChangedCallback = callback
+    }
+
+    protected fun onChanged() {
+        if (onChangedCallback != null) onChangedCallback!!.run()
+    }
+
+    protected abstract fun setEnabledImpl(enabled: Boolean)
+}