Fix the alarm indicator's opacity

Makes the text shadow mostly opaque. This improves the readability of
the text considerably, and also unifies the look with the stock AOSP
clock widget.

Change-Id: I6cb267310dd8d64702e323ba5fad66d3e27a8b6b
Merge "Fix the alarm indicator's opacity" into cm-10.1
Merge branch 'cm-10.1' of github.com:CyanogenMod/android_packages_apps_LockClock into cm-10.1