Set autosuspend delay for Fibocom LG850-GL

Set autosuspend delay for Fibocom LG850-GL

It has been shown that the autosuspend delay for this device enacted
by modem manager will race with suspend and cause system suspend
failures.

This occurred in ChromiumOS on a chromebook, but there is no reason
it won't happen in regular notebooks with the same WWAN.  To avoid
the failure delay autosuspend to a frequency longer than the polling
rate used by modem manager.

Link: https://chromium-review.googlesource.com/c/chromiumos/overlays/board-overlays/+/3635003
Link: https://github.com/freedesktop/ModemManager/blob/43e76bf1bbca8207e37d3fbddfed4bb8578f0170/src/mm-iface-modem.c#L1633