Fix EmergencyCallHelper to always use the current phone object.

EmergencyCallHelper could use the wrong phone object when called
on an encrypted device while it's changing from GSM to CDMA mode.
Remove local mPhone field and call mCM.getDefaultPhone() to get
the current phone object before each call.

Bug: 11561165
Change-Id: Ie6a23d78050f2dffbf92761e3ca0ee283e4192e3
1 file changed