Frameworks : move custom strings to cm_strings.xml

Change-Id: Ie70f69474b9e83b6f9e2df4d34d6109008343356
Merge "Frameworks : move custom strings to cm_strings.xml" into cm-10.1
Merge branch 'cm-10.1' of https://github.com/CyanogenMod/android_frameworks_base into linaro