Revert "[usb-moded] Do not pop-up ask dialog if charging mode was chosen before device locked up. Fixes: JB#13550"

This reverts commit 3d011a02241fd11199d378bbe05a2d8066dcfd97.

We do not need charge_mode_set anymore as we have now a completely
separate charger fallback mode.

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

Conflicts:
	src/usb_moded.c