Modified "Empty button" > "Leave empty"

"Empty button" implies a placeholder button, which could be confusing to new users.

Change-Id: I092bdb0c8d3cfad79560526f383cdb7efb730a06
Lockscreen wallpaper for themes

Change-Id: If77b97301c5bfebd94b193fe9a54e676e678d3ed
Merge "Lockscreen wallpaper for themes" into cm-11.0
Make the default value of in-call noise suppression configurable.

Change-Id: I1dc0b6085807c49370a06243689b70ea4b91732b
Merge "Modified "Empty button" > "Leave empty"" into cm-11.0
Merge remote-tracking branch 'github/cm-11.0' into cm-11.0