Move shortcut falsing shake and vibration to onclicklistener

This moves the falsing-required shake and vibration to a traditional
OnClickListener, accomplishing two things:
- Allowing a11y users to have the same experience as non-a11y users
- Make the system feel a bit snappier, as the shortcuts now react sooner

Bug: 283042620
Test: manual - with MIGRATE_SPLIT_KEYGUARD_BOTTOM_AREA both on and off
Change-Id: I2e09718bb2d70983275d0b3e214b344c13f9843b