Android: Convert AbstractStringSetting to Kotlin

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/AbstractStringSetting.java

@@ -1,13 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package org.dolphinemu.dolphinemu.features.settings.model;
-
-import androidx.annotation.NonNull;
-
-public interface AbstractStringSetting extends AbstractSetting
-{
-  @NonNull
-  String getString();
-
-  void setString(@NonNull Settings settings, @NonNull String newValue);
-}

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/AbstractStringSetting.kt

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.dolphinemu.dolphinemu.features.settings.model
+
+interface AbstractStringSetting : AbstractSetting {
+    val string: String
+
+    fun setString(settings: Settings, newValue: String)
+}

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/view/DateTimeChoiceSetting.kt

@@ -19,6 +19,6 @@ class DateTimeChoiceSetting(
     }
 
     fun getSelectedValue(): String {
-        return setting.getString()
+        return setting.string
     }
 }