[3/3] autoclick: Implement ignore minor cursor movement setting

1. When ignore cursor movement is OFF: The mouse can move anywhere
inside the ring indicator without resetting the click timer and the
center dot will follow the mouse.

2. When ignore cursor movement is ON: The mouse can move anywhere
inside the ring indicator without resetting the click timer and
the center dot stays in the center.

Demo: http://b/430320631#comment6

Change-Id: I713d4a3c74710accb2d27bebaaad502cc73b178d
Bug: b/430320631
Test: AutoclickControllerTest
Flag: com.android.server.accessibility.enable_autoclick_indicator