UnifiedEmail: Improve string

Change-Id: Ida9bb8d98da10612b0110f9b6d0a36bf6a9efaa6
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_UnifiedEmail into cm-11.0
Automatic translation import

Change-Id: I41c4b538990e2f975313b451d72a5274969b26c6
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_UnifiedEmail into cm-11.0
Merge branch 'cm-11.0' of https://github.com/temasek/android_packages_apps_UnifiedEmail into HEAD