Select a better phone for emergency call

In multi-sim (such as DSDS), when there are multiple Phones that have
the dialed emergency number, we should pick up a better Phone to dial.

Test: Treehugger
Bug: 131354238
Change-Id: I9135b5fc08e9bc8351d0503cb6974ce74ed3975c
Merged-In: I9135b5fc08e9bc8351d0503cb6974ce74ed3975c
(cherry picked from commit 822332365a06cd758a53627ab9ff293e8d6826b5)
1 file changed