base-bearer: use an initial longer timeout for connectivity check

If we ask too quick for the PDP context status after a successful
connection attempt reported by the modem, we may find it still flagged
as inactive if the modem is still busy setting up the PPP session.

Do an explicit longer initial timeout before we run the first check,
and after that one setup the additional checks at a higher rate.

Reported-by: Colin Helliwell <colin.helliwell@ln-systems.com>
1 file changed