Fix that accessibility shortcuts still turned but FM disappeared on the screen...

Fix that accessibility shortcuts still turned but FM disappeared on the screen in owner mode after switching user.

Root cause:
Accessibility manager service seems to be not ready.

Actions:
Add the service callbacks to avoid getting wrong shortcut data.

Bug: 258320314
Test: atest MenuInfoRepositoryTest
Change-Id: Ib37b1fbd7964974bf5eb6791b25e95f180fa9f7a