i have the following remote config_default.xml file
1. Use firebaseConfig.setDefaults(Map); for setting up the default configuration.
2. Use backslash (\) before Double Quotes(") in your String in .xml file.
3. Replace classpath 'com.android.tools.build:gradle:3.0.1' with
*classpath 'com.android.tools.build:gradle:2.3.3'*
and Relpace google() with
maven { url 'https://maven.google.com' }
4. Add android.enableAapt2 = false in gradle.properties