Allow default phone to be used for per device API

Before the change, when device has no active SIM, phone will be return as null. After the change, for per-device APIs, we use default phone(default sub phone or phone 0) to execute the API.

Fix: 274867802
Test: data browsing + voice call
Change-Id: If9442737d3dc16294c4cc35e9b705cc4d190c566
1 file changed