ams_tmd2772: adjust proximity thresholds

A small number of devices were right on the boundary of the threshold,
so it would lead to a state where the device got stuck at "near". The
problem would have been solved with factory calibration, which was not
performed.

Bug: 29872242
Change-Id: I53e152d030b3d7e25de5bb88d80f4eac8da7e6cf
1 file changed