Falsey check for NotifyItem button
Falsey check for NotifyItem button

Fixes https://github.com/brave/browser-laptop/issues/11282

Auditors: @cezaraugusto, @kjozwiak

Test Plan:
See https://github.com/brave/browser-laptop/issues/11282
(I ran these steps and verified the fix)

diasdavid/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop