Revert "TouchExplorer computes incorrectly the click location."

This reverts commit 851a5059a47cbf76e530c9d050a677cb6e3f8657 as
it creates a regression. Let us revert this and correctly fix the
issue the original change was trying to address.

bug:17789608

Change-Id: I8abb1a61d5310430e839e4ef60e7ca5cc0cbdd80