Ensure installed packages do not leak when calling placeCall

By checking if the target PhoneAccountHandle packageName matches
the calling package before determining selfManaged attributes,
we stop the leak of installed packages that may be associated
with a specific test PhoneAccountHandle.

Bug: 231988638
Bug: 265321471
Test: atest TelecomUnitTests; atest CtsTelecomTestCases
Change-Id: I1ab81c69a32f398152fb5e00615bd395f96dadba