Use UI listener for preferred account worker in in call UI

Before this CL it is ran on a non-UI task, where the callback might happen after the activity has already ended.

TEST=manual
Bug: 78517857
Test: manual
PiperOrigin-RevId: 194169377
Change-Id: I0011019cb31b0b2c01c9d774776fb44dcac4d8c6
1 file changed