DeskClock: Fixup summary texts for shake and flip actions

This introduced on http://review.cyanogenmod.org/#/c/56698/

Change-Id: If2615210e3dfd15c510c1b18ec2f26a0b24a227d
(cherry picked from commit 8fbfbe2afb15daa540621c32ba3ddbe6d05d2fdc)