Idle inhibit during (video) call

### Your use case

#### What would you like to do?
During native as well as Jitsi video calls, Element should inhibit the idle daemon ("screen lock"/"screen saver").
Idle should probably be inhibited in voice calls too as 1. it might mess up things and 2. you want to see that a call is ongoing and can still trigger idle manually otherwise.

#### Why would you like to do it?
To stay in the call

#### How would you like to achieve it?
applicable idle inhibit protocol, in my case I think https://gitlab.freedesktop.org/wayland/wayland-protocols/-/tree/main/unstable/idle-inhibit

### Have you considered any alternatives?

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### Additional context

I noticed this using desktop Element Nightly version: 2021110701 Olm version: 3.2.3 from aur/element-desktop-nightly-bin with ozone on sway, i.e. a wayland native session, during a 1:1 (p2p) call in an e2ee room.

Start by checking the linked Wayland idle-inhibit protocol and the desktop call paths for native and Jitsi calls. Confirm whether voice calls should also inhibit idle, then validate on a Wayland session that the idle daemon stays inhibited during calls and is released afterward.

Written by the indexing model from the issue text.