Remove HAVE_SELINUX guards

Android 4.3, and by extension CM 10.2, default to having SELinux on

Change-Id: I0f83c0b9712388216b89dfbe6184ad0a220a74d6
Align the status bar date to the bottom

As in AOSP. Also occupy the whole height area so that the date can be
easily clicked.

Change-Id: I66e5b7a754f27571f987657cc7ccd2ef3bef3f9e