Delete voicemail data when source package is uninstalled.

The deletion of voicemail data for the uninstalled package is done
through a service. The PackageIntentReceiver just forwards the package
removal intent to the service after sanity check that the intent is
really for an uninstalled package.

The logic to check whether the intent should trigger a clean up is
repeated in VoicemailCleanupService as well. This provides an extra
safety net and and also lets the unit test cover this functionality.

Bug: 5056159
Change-Id: Id7315a1318d510b50878f26c2e0d380c1920ee4e
6 files changed