Enable HAS_DISPLAY_TIMEOUT by default

Signed-off-by: Simon Busch <morphis@gravedo.de>
DisplayManager: drop code to control vsync

Signed-off-by: Simon Busch <morphis@gravedo.de>
DisplayManager: remove input event handling logic

Signed-off-by: Simon Busch <morphis@gravedo.de>
Remove unused MetaKeyManager

Signed-off-by: Simon Busch <morphis@gravedo.de>
Implement InputEventMonitor to control display with power key and touchpanel

Signed-off-by: Simon Busch <morphis@gravedo.de>
Disable lockscreen until we have one implemented

Signed-off-by: Simon Busch <morphis@gravedo.de>