Add "Reduce Loud Sounds" or "Night mode for audio"

[sguinetti]

Is your feature request related to a problem? Please describe.
In some cases, when watching TV in a quiet place (or at night), even with the smartphone with speakers, an unexpected loud noise occurs annoyingly and can be heard by other people (outside the place). In some cases, the volume of the device needs to be turned up or down but it is somewhat uncomfortable.

In the case of headphones, the situation changes. It turns out that if the user is using headphones for a long time during leisure or work and resorts to very loud and non-controlling sound effects, depending on the sensitivity of each one, the ears might hurt or feel blocked.

Describe the solution you'd like
Activate an option for a "Reduce Loud Sounds" mode. This feature can be described as "dynamically adjust the volume level".

Describe alternatives you've considered
The feature would appear in the application settings. In some devices there may be an option to reduce noise externally but they are usually not completely efficient. That is why implementing this application is quite necessary.

Additional context
Based on filters loudnorm or dynaudnorm (FFmpeg, see iina/iina#1492) and VSG:Audio:Normalization

See also Stremio/stremio-features#313 and jellyfin/jellyfin-androidtv#1434