CM PlatLogo: CyanogenMod version preference (2/2)

Binds the CyanogenMod version preference to launch CM easter egg
upon multiple taps.

Change-Id: I8e06642944d24581c0932c9964f2d9615bfcb832
Merge branch 'cm-12.0' of git://github.com/CyanogenMod/android_packages_apps_Settings into cm-12.0