Add debug logs in case of untrusted touches

To help debug those. It's currently turned on to help debug incoming
bugs while in dogfood. I intend to turn off the flag later on.

Test: Perform an untrusted touch, then verify logcat.
Bug: 158002302
Change-Id: Ie335ec079bb2be8cb9d11fba687634686eecef1c
2 files changed