mint: build XperiaSettings, add overlay

Change-Id: Ic6d8d40f6488db9198ad34d3c31b942980c72c21
Signed-off-by: ChampionSwimmer <android@championswimmer.tk>
Merge branch 'cm-10.1' of https://github.com/CyanogenMod/android_device_sony_mint into jb-mr1