Don't leak input events to dumpsys on user builds

Remove the details of KeyEvent and MotionEvent logs.
Bug: 139945049
Test: Tested on a device, the input functions work as expected and input
event logs are not leaked to dumpsys on user builds.

Merged-In: I98c9c375f18963177bf0c1d8829a217b4ad4acc6
(cherry picked from commit 3b7d7797)

[basilgello: Back-ported to 14.1:
 - motionActionToString and keyActionToString helpers are not present]
Signed-off-by: Vasyl Gello <vasek.gello@gmail.com>

Change-Id: I98c9c375f18963177bf0c1d8829a217b4ad4acc6