Enforce simultaneous calling accounts have the same package name

When an app restricts simultaenous calling to a subset of accounts,
ensure that they register accounts with their package name.
Simultaneous calling is always possible across apps as long as
the app being set inactive has the ability to hold.

Bug: 319904227
Test: atest TelecomUnitTests:TelecomServiceImplTest
Change-Id: I555242ef1419fa5cb0d65ae8035db6e80c904e20