Fix infinite loop of launching Call accounts on multi-sim device

"Calling accounts" preference is displayed repeatedly, and user can
transit infinitely on multi-sim devices.

To resolve this issue, hide "Call accounts" preference in
"Call settings" on multi-sim devices.

Bug: 110908265
Test: manual - Checked that "Calling accounts" preference is not
displayed in "Call settings" screen on the multi-sim device.
Change-Id: Idd002c7f52d9b22c6c2fc633968a3e5cd018bf43
1 file changed