Refactor PreferredAccountWorker to provide the dialog to be shown.

When dual SIM selection support is added to In Call UI it was a rush order and codes are duplicated. This CL moves the duplicated logic into PreferredAccountWorker so the same dialog can be shown for both.

TEST=manual
Bug: 69675796,72618783
Test: manual
PiperOrigin-RevId: 194845320
Change-Id: Id283ca7616580b0efd4e8f02e63691c70ee7f93c
17 files changed