This adds support for specifying options needed to deal with phone
display panel pecularities (ex. screen curves, notches, punch holes)
This is implemented as settings in ~/.config/plasmamobilerc, which can
set panel heights, paddings, and center spacings to duck display
cutouts. The pixel values are scaling independent, and so are not
affected when the display scaling is changed.
This is then exposed over DBus, so that components from outside of
plasmashell (ex. KWin) can access it easily without needing to connect to
kscreen themselves. Each screen is exposed as a single object.
Currently support is only added in the status bar and the navigation
panel.
Currently all screens have the settings applied. In the future, we may
want to limit this just to the internal screen (?)
---
This also adds a "devices" folder (in `devices/configs`) where per-device configs can be set.
This is installed to `/usr/share/plasma-mobile-device-configs`.
In `plasmamobilerc` (installed to `/etc/xdg/plasmamobilerc`, or
`~/.config/plasmamobilerc`), envmanager will read:
```toml
[Device]
device=oneplus-enchilada
```
for the device config to use and write its settings to
`~/.config/plasma-mobile/plasmamobilerc`.
Fixes: https://invent.kde.org/plasma/plasma-mobile/-/issues/423
We currently listen to when the volume changes, which wouldn't happen if
the user reaches 0% or 100% and continues trying to press the volume
button. Instead, listen to OSD events for determining when to open the
popup.
Ensure that all of the variables have their initial state fetched at the
start with the shell DBus client. Also ensure that they only emit
property changes when they actually happen.
Overlay the shell's status panel and quicksettings panel over the lockscreen, instead of rendering a second copy in the lockscreen theme. This will allow us to improve the lockscreen loading speed.
Key changes:
- Overlay quicksettings window and the status bar over the lockscreen when it is shown
- Refactor the top panel's showing logic to be cleaner (as it supports various overlay modes over fullscreen apps already)
- Implement lockscreen support to the status bar and quicksettings panel in the to panel
- Forward quicksettings panel requests for "unlock" over DBus to the lockscreen
- Add "raiselockscreen" QML plugin to easily request a window to be raised over the lockscreen
Notes:
- Now that we are sharing the quicksettings panel from the shell, notifications that are already there will be shown on the lockscreen (compared to right now, where only new notifications would be shown)
Depends on:
- https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2339
- https://invent.kde.org/plasma/kscreenlocker/-/merge_requests/283
- https://invent.kde.org/plasma/kwin/-/merge_requests/7839
Implements: https://invent.kde.org/plasma/plasma-mobile/-/issues/199

Disables gesture navigation when Action Drawer, Notification Popup Drawer, or VolumeOSD are visible as activating the task switcher in these situation can feel a bit weird.
Note:
~~Draft for in till I can get side loading working again so I can test it on device.~~
Still can't seem to get side loading working quite yet. Though, I did run the test I could from my laptop and it does seems to be working fine, so I will be removing this from draft.
These changes make the navigation and status bar accessible from within fullscreen applications by allowing the user to tap on the top or tap or drag on the bottom of the screen.
Also, since the top panel is now over top of all fullscreen applications, this moves the action drawer swipe area back into the status bar.

The eventual goal is to have as few singletons with state as possible in the mobileshell component when it is imported into components such as the lockscreen.
This doesn't fully accomplish it, but moves the audio provider singleton to MobileShellState, which will eventually need to be prevented from importing into non plasmashell processes.
This also disables the sound feedback when changing volume, since it can be a source of lag when showing the applet.
Having a global set margins and orientation (that were calculated from the panel containment) caused a lot of issues with the way bindings were evaluated across panels, and with high coupling.
Now use properties from within containments to determine shell margins instead, which removes the dependency on other containments for measurements. This allows us to get rid of TaskPanelControls as well!
Fixes: https://invent.kde.org/teams/plasma-mobile/issues/-/issues/198