[1/2] Add lockscreen rotation as an optional rotation setting

Taken fom:

https://github.com/gokussjx/cm_packages_apps_Settings/commit/a83ae47e184a778ca3067416c56901da70c1bc27

PS7
fixed value handling
PS8
Fix option doesn't stick

Change-Id: I3fd1d2c31d83230d480a0027cb7bf5fcf2db5cb7
Settings: Fix blacklist settings

Change-Id: Ibe5099f132eb7e496469381b4ac3af11d0ecaac6
Merge pull request #2 from omnirom/android-4.4

merge