DO NOT MERGE Add notification for SIM import

This provides feedback to the user if the import takes some time. Also
moved SIM import into it's own service instead of ContactSaveService
to prevent blocking the save service with a long-running operation.

Test
manually verified that notification is displayed when contacts are
imported from the SIM card

Bug 32781237

Change-Id: I8f26e524a08b62f69ff06ddb45cec2db5e98fe24
(cherry picked from commit ba47b41205ddcc3872d52bede1f6aaffb4c874b8)