Fixes commons-app#3532

* Ask gitignore to not ignore .idea/codeStyles/codeStyleConfig.xml & not .idea/codeStyles/

Author: ashishkumar468

.gitignore

@@ -6,7 +6,7 @@
 app/src/main/gen/*
 
 # IDEA/Android Studio Ignore exceptions
-!/.idea/codeStyles/
+!/.idea/codeStyles/codeStyleConfig.xml
 
 # Gradle
 .gradle