Only Redial calls in the case of Emergency Calling

Currently, if there are multiple Calling Accounts and a call fails, we
redial the call on another Calling Account. We should only redial if it
is an emergency call being placed and it has failed from Telephony with
an Error.

Bug: 29877938
Change-Id: I2efa9f7f06e9eed03799c1514a027cf73ea5b3ee