[FSSDK-12115] Notification center type definition update #1452

Job	Run time
lint	1m 6s
crossbrowser_and_umd_unit_tests	2m 35s
lint_markdown_files / lint	1m 10s
unit_tests (16)	2m 20s
unit_tests (14)	2m 14s
unit_tests (18)	2m 8s
unit_tests (20)	2m 0s
integration_tests / test	8s
fullstack_production_suite / test	6s
Coveralls coverage	3s
	13m 50s

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