Keyguard: allow keyguard to be dismissed via intent

Requires system permission "android.permission.CONTROL_KEYGUARD"

Change-Id: I9f8f5ca90a65b949d43fac33ce3e9e39ffdf9254
Signed-off-by: Roman Birg <roman@cyngn.com>
frameworks: add SmartCover stubs

Change-Id: Ibde77eb23b604afb20b54642113fcdae9c87fd1b
Signed-off-by: Roman Birg <roman@cyngn.com>