LockScreen: Option to hide initial page hints (1/2)

This will add an option to hide the initial page hints
that are shown left and right when the device is turned on.

Change-Id: Id4f29f7cfbaca6b4dd91f0b2de2b8195a966259b
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Lockscreen: fix hiding of initial page hints for landscape

Change-Id: Ied7a1a0401b7dae9d1900202a51eda34552b4f63
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
LockScreen: fix twisted logic for hiding page hints

DERP!

Change-Id: I394503ddd72a601f9768d150daa32222fffa6a05
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Lockscreen: add missing import to fix building

Change-Id: I5aef2d22f3ea9dfb1b7639fc1b086bfcfc8099ff
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>