Update sdl_styles.xml
Update sdl_styles.xml

support RTL , 

https://github.com/avast/android-styled-dialogs/pull/62
jaohoang/android-styled-dialogs,vmailapp/android-styled-dialogs,draekko/android-styled-dialogs,hgl888/android-styled-dialogs,fengchenlianlian/android-styled-dialogs,aaaliua/android-styled-dialogs,YlJava110/android-styled-dialogs,wtttc/android-styled-dialogs,shihabmi7/android-styled-dialogs,AndyScherzinger/android-styled-dialogs,ajrulez/android-styled-dialogs,avast/android-styled-dialogs,Heart2009/android-styled-dialogs,MaTriXy/android-styled-dialogs