Add NullPtrCheck when smearing in settings

This only happens in new device with broken power_profile.xml, in
which it doesn't have screen power model.

This CL catches the null pointer crash and log it.

Change-Id: Iac23e3a8fc51385bdb22979c4b59000319f6fd49
Fixes: 74617269
Test: RunSettingsRoboTests
2 files changed