Remove click action from AccessibilityNodeInfo

Due to the requirement that the SliderPreference be selectable for
keyboard navigation and to display a dialog when restricted, it must be
set as selectable. However, this causes accessibility services to
announce an irrelevant description when the slider preference is
focused. Removing click action from AccessibilityNodeInfo to fix it.

Bug: 431890794
Test: Manual test with Talkback and test with CtsVerifier
Flag: EXEMPT only changing accessibility node info
Change-Id: Id14fb4849045c87d1130c789962c921640984304