Handle SIGNAL_LOST(-3) as a retryable error.

Qualcomm reports SIGNAL_LOST when a signal is lost temporarily
and should be retired. If a radio technology changes then the
DataConnection will stop retrying and the DcTracker will get a
new configuration and setup a new data call. If the rat doesn't
change then DataConnection will reestablish the call on the next
retry attempt.

Bug: 10804691
Change-Id: I4d310e7f2ea2dc46c7bcdd2b8687d1ef6b901e01