Guido Gunther authored Jun 23, 2020 and Sebastian Krzyszkowiak committed Mar 31, 2021

The rotation manager listens to device orientation changes
and adjusts the primary display accordingly.

This interfaces with lockscreen, iio-sensor-proxy and
gsettings to figure out the correct screen orientation.

The manager has two modes: off (don't rotate any output) and sensor
(adjust due to sensor values).

Signed-off-by: Guido Günther <guido.gunther@puri.sm>