[FSSDK-12115] Notification center type definition update #1444

Job	Run time
lint	1m 12s
crossbrowser_and_umd_unit_tests	2m 51s
unit_tests (20)	2m 3s
unit_tests (14)	2m 16s
unit_tests (16)	2m 12s
unit_tests (18)	2m 12s
integration_tests / test	6s
lint_markdown_files / lint	1m 2s
fullstack_production_suite / test	5s
Coveralls coverage	5s
	14m 4s

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