Adjust KitKat easter egg to display "K" no matter what

The way is currently working, it pulls the first letter of the build_id for the easter egg. This is making it to where some devices show a "J" instead of a "K", the way it was meant to be.

Change-Id: I6e91bdc5695e2b2e8317a4ba20df33d6f744437f
Merge "Adjust KitKat easter egg to display "K" no matter what" into android-4.4
Merge remote-tracking branch 'cm/android-4.4' into android-4.4