tree 97e7e3ff033e5cf1c1922c46437827530c511430
parent 5733d64cac88607671cd4e6059be80cb8cfa926a
author Siarhei Vishniakou <svv@google.com> 1535492543 -0700
committer Siarhei Vishniakou <svv@google.com> 1535503030 -0700

Remove VelocityTracker abstraction

For older hardware with noisy touchscreens, a custom version of velocity
tracker, NoisyVelocityTracker, was needed. Since the hardware keeps
improving, and with recent bugfixes in VelocityTracker, these additional
layers of abstractions are no longer needed.

Some more improvements:
- mVelocityTracker is now never null
- VelocityTracker already clears its state when receiving ACTION_DOWN,
so no need for additional object destruction / creation. Replace these
calls with VelocityTracker.clear() instead.

Test: manual interaction with notification panel (pulling down, flinging
at various points).
Bug: 113070322

Change-Id: I186a6b1c3fc91ec6c18bc0248d6e36f76c65e564