Do not allow toggle to be clickable/focusable

The entire preference is already clickable/focusable. Also, changed it so that
the entire preferenceview is clickable/focusable in non-accessibility mode as well
to better match Settings UX.

Also, no need to setClickable, since it is already by default

Fixes: 130398575

Test: With and without accessibility turned on, toggle works
Test: With accessibility turned on, toggle no longer takes a separate
      focus in addition to the preference

Change-Id: Iaff05cdf350f8d4f4c0f53b539770a7ad1f7d8ad