Reject touch when the stylus hovers

At the moment we disable touch when the stylus is in contact with the
screen, but we don't when the stylus is hovering, which is different
from how other platforms operate.

Bug: 301216095
Test: Flashed on real device
Change-Id: I481ec41a82d7de6da28c5b122450e0bd8faea66f
2 files changed