Export touchpad hardware state from libinputflinger

Export libchrome-gestures_headers from libinputflinger so that we can
expose touchpad hardware state outside of InputReader via the policy
interface.

Bug: 286551975
Test: Build
Flag: EXEMPT refactor
Change-Id: I58bdea433e090c98f4aeddfb43b063b2b944de7a
3 files changed