a11y: Add AutoclickTypePanelView

Allow users to choose different type of auto click, e.g. right click,
double click, drag, scroll, etc.

This panel will be dynamically changed (styling, buttons, size, etc).

Screenshot: http://b/388845485#comment3

Change-Id: If9e76bc2763b5fc1b6e8df437a3591f99314ba3d
Bug: b/388845485
Test: AutoclickControllerTest
Flag: com.android.server.accessibility.enable_autoclick_indicator