Revert^2 "Enable new touchpad stack by default"

This reverts commit e60fa698.

Reason for revert: the issue behind the original revert (caused by the previous CL in the chain) has now been resolved.

Bug: 251196347, 264996455
Test: presubmit
Change-Id: I4471d1e6bdd910b06b50a24d7999e2228983b4c5