Use Database number even radio indication is not ready

We really  need to use database numbers even sometimes (such as
 race condition during the phone construction) the numbers from
radio indication are not ready.

Test: manual; Treehugger; atest EmergencyNumberTrackerTest
Bug: 152923338
Change-Id: I79385c9cbb1be66c00f818f6c3712bc0f010425c