Tests for requestDisallowInterceptTouchEvents

Bug: 185906621

When overscrolling, there is no need to call
disallowInterceptTouchEvents(). A test was added to ensure that
it isn't called during the touch down while the animation
is progressing.

Test: new test

Change-Id: Ia9ac6d81a5b60222f489ea87f31ecba0c1d48cea
(cherry picked from commit 044c71b8fab8ea16400dbbb01604ce0cc894c6f8)