Log widgets source.

Test: manual
(1) Upgrading to new DB version is successful (no errors thrown in logcat)
(2) Widgets that were added with the old DB version have CONTAINER_UNKNOWN as their source container
(3) Widgets that are added with the new DB version still log source container after reboot
Bug: 185778648
Change-Id: Iaa38f0be6bc4cb0d29842f9a2ea0d08de000c930
16 files changed