[automerge] TouchExplorer: allow service to initiate touch exploration and...

[automerge] TouchExplorer: allow service to initiate touch exploration and there are no pointers on the screen 2p: 7cb26674 2p: 9491c3a1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17642884

Bug: 223673301
Change-Id: Icf128feae8eaf45d662d303c9d1c03b76074a4c9