Strings: Update See-Through Selector

'See-Through' did not denote that it was the coveted Lockscreen Blur and
there have been many questions asked about the blur effect and where to enable it

Modified res/values/cm_strings.xml to change name of selection from See-Through to Lockscreen Blur

Change-Id: I5f191668de17f45ab3d4d3e27492764699c82a30