Fix data call issue for single pdn case.

When a higher priority apncontext is scheduled for retry, default
data cannot be setup if only single pdn is allowed. If the higher
priority apncontext is later cleaned up before the retry alarm expires,
default data is never re established.
To fix this, try setup data on connectable apns after an apncontext
is cleaned up.

CRs-Fixed: 715866, 857421, 818834

Change-Id: Iec72615feea4ae37c7b0eb5748a4bae106ecce26

Change-Id: Ie33517da67b370104044eeff22a00420478fcf34

Change-Id: I80e97f6d862ef27e0237db332280e7296d9eebe9