Add more usb mode name configuration entries

Although the heuristics for determining whether a usb mode name
means that the device is charging and/or mounted works correctly
for "dedicated_charger", "mode_requested_show_dialog" and "ask",
not having explicit configuration entries for these causes dsme
to emit unnecessary warnings to journal.

Add missing usb mode name configuration entries.

[usbtracker] Add more usb mode name configuration entries. Fixes JB#24839
Merge pull request #86 from spiiroin/jb24839_dedicated_charger_usb_mode

Add more usb mode name configuration entries