Add high touch sensitivity and hovering to InputService

Doing so allows us to keep track of user changes and restore
preferences.

This commit is squash of the following commits from CM 13.0:
7348be747940afe7c3ec6a2b133b5473bc18573a Move high touch sensitivity and hovering to InputService
f9a9d50491dc583ea568a4f12e57a2f97b9baacb InputMethodManager : Move registration to systemReady

Since lineage-17.1 services/core/java/com/android/server/InputMethodManagerService.java is moved to
services/core/java/com/android/server/inputmethod/InputMethodManagerService.java

Change-Id: I5a6af73129acefa6530ceb3f73cc4cd83a19a676
Ticket-Id: CYNGNOS-1166