fix wrong display name of built-in icon set in non-debug builds

src/keepass2android/app/App.cs

@@ -64,7 +64,7 @@ namespace keepass2android
 	public static class AppNames
 	{
 #if DEBUG
-		public const string AppName = "Keepass2Android Debug";
+		public const string AppName = "@string/app_name_debug";
 #else
 		public const string AppName = "@string/app_name";
 #endif

src/keepass2android/settings/DatabaseSettingsActivity.cs

@@ -166,7 +166,7 @@ namespace keepass2android
 
 				_iconSets.Add(new IconSet()
 				{
-					DisplayName = AppNames.AppName,
+					DisplayName = Context.GetString(AppNames.AppNameResource),
 					PackageName = Context.PackageName
 				});