Settings: add new slim actions

add central strings and array for it

Change-Id: I68b2a5176fd0106c10c533242f5b41d5935c9e0a
fix a typo in DE-translation

Change-Id: I54a746877a0b6dd43aba89e750b6b0bc789d4958
Settings: allow device trees to invoke custom display settings

in this case gesture control settings.

Intent used: com.slim.action.LAUNCH_SCREEN_OFF_GESTURE_SETTINGS

Change-Id: I82f5a8a4075f109419b08014ad2d723bf2f54402
Merge "Settings: add new slim actions" into kk4.4
Merge "Settings: allow device trees to invoke custom display settings" into kk4.4
Merge "fix a typo in DE-translation" into kk4.4
merge changes from Slim kk4.4 into local branch