DeskClock : Lockscreen dismiss Fix

https://jira.cyanogenmod.org/browse/CYAN-1116

Issue : Alarm dialog would unlock the lockscreen.
Resolution : Remove FLAG_DISMISS_KEYGUARD flag.

Change-Id: I9920376a2f8195b80f2907052dbfe353c4cb54a7
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_packages_apps_DeskClock into cm-10.1