build: add suffix for extended build

Author: asandikci

gradle.properties

@@ -4,3 +4,4 @@ android.nonTransitiveRClass=false
 android.useAndroidX=true
 org.gradle.jvmargs=-Xmx2048M --add-opens jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED
 systemProp.file.encoding=utf-8
+packageSuffix=extended