* Adds text values for the call settings sliders.
* Replaces `onChange` events with `onInput` events so that the values
respect the position of the sliders.
* Debounces some functions to handle the increased amount of calls
due to the swap to the `onInput` listener.
* Changes the default value of `voiceActiveDuration` from `0` to `200`
to match the minimum value of the input.
closesodoo/odoo#151028
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>