Makes power profiles handling available over D-Bus.
power-profiles-daemon offers to modify system behaviour based upon
user-selected power profiles. There are 3 different power profiles, a
"balanced" default mode, a "power-saver" mode, as well as a "performance"
mode. The first 2 of those are available on every system. The "performance"
mode is only available on select systems and is implemented by different
"drivers" based on the system or systems it targets.
In addition to those 2 or 3 modes (depending on the system),
"actions" can be hooked up to change the behaviour of a particular device.
For example, this can be used to disable the fast-charging for some USB
devices when in power-saver mode.
Note that power-profiles-daemon does not save the currently active
profile across system restarts and will always start with the "balanced"