Moved KeyguardDismissHandler initialization in KeyguardDismissUtil

The KeyGuardDismissHandler was not being initialized for secondary users.
To fix this, the KeyguardDismissUtil is refactored to initialize the
dismissHandler during constructor injection.
This ensures that the dismissHandler is initialized for all users,
including secondary users.

Test: tested screen recording and share option from notification bar
on a secondary user
Test: atest RecordingServiceTest -c, atest SmartReplyViewTest -c
Bug: 274613098
Bug: 279559510

Change-Id: I4b439bebae93a09dcf76c6412598a0b640b8a215