Revert "Change fan trip temperature to 50C"

This reverts commit 34ba2310d027617740d572245cd1813c31398436.
Which was pushed to address b/128071242.
After some discussion it's most likely a power supply issue
unrelated to temperature.

Change-Id: I11f3a634ceea6c00161b1aeb5c092411ab173be9
(cherry picked from commit 79cef0796de678a33359099134fbf0a4932a547a)