a11y: Add autoclick panel expanded/collapsed state

Panel is initilized in collapsed state. By clicking left-click button,
the panel is expanded showing all available click type buttons, e.g.
right-click, double-click, scroll, drag.

Upon clicking the selected button, the panel is collapsed and only
displays the selected click type.

Screen recording: http://b/393548471#comment2

Change-Id: I498c6d2ecf80c88ced1a5cb68435909f4202c3ef
Bug: b/393548471
Test: AutoclickTypePanelViewTest
Flag: com.android.server.accessibility.enable_autoclick_indicator