[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
fixes
Merge branch 'android-4.4' of https://github.com/omnirom/android_packages_apps_Settings into android-4.4
asdsad
Merge branch 'android-4.4' of https://github.com/AnimeROM/android_packages_apps_Settings into omni-android-4.4