createNewColorsFile function
Creates a colors.xml file if it was missing from android/app/src/main/res/values/colors.xml
Implementation
Future<void> createNewColorsFile(String backgroundColor, String? flavor) async {
final colorsFile = await File(constants.androidColorsFile(flavor))
.create(recursive: true);
await colorsFile.writeAsString(xml_template.colorsXml);
await updateColorsFile(colorsFile, backgroundColor);
}