[evdev] Update switch states when input device is added. JB#33997
[evdev] Update switch states when input device is added. JB#33997

Switch states are evaluated after adding io-monitors for input devices
that were present at mce startup, but not when new input devices get
added after mce startup.

Check switch states also when input devices are added/removed.

mlehtima/mce,maikelwever/mce,spiiroin/mce,mlehtima/mce,maikelwever/mce,spiiroin/mce,mlehtima/mce,spiiroin/mce,mlehtima/mce,maikelwever/mce,maikelwever/mce,spiiroin/mce