libsystemsettings.so is using Sailfish::KeyProvider::ProcessMutex which
was introduced in libsailfishkeyprovider 0.0.14

Since geoclue-hybris now requires LocationSettings, we need to expose
this as public API in nqp-ss.

This commit also exposes the gpsFlightMode setting as the inverse of
the "gps" technology's powered state (from connman).

Contributes to JB#37470

These were not direct dependencies; they are better handled elsewhere.

Each instantiation of display settings object blocks until it can finish
13 sequential blocking method calls to get current values of mce settings.

Use expected-by-default values in constructor, then update to currently
used values via a single asynchronous get_config_all mce dbus method call.

The com.nokia.mce.request.get_config_all is available in mce >= 1.83.0.

[datetimesettings] Remove QmTime dependency (use timed directly)
[usbsettings] Remove QmUsbMode usage (use usb_moded directly)
[usbsettings] Allow setting of current mode
[usbsettings] Re-use old enum values from qmsystem2 for compatibility
[usbsettings] Require usb-moded >= 0.82

[plugin] Add disk usage component. Contributes to JB#14894

Have the dedicated charger mode forwarded from qmsystem so we can
use it in the settings.
Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

This also makes orientationLockChanged signal work.