Avoid overriding doze screen-state reason to default

The doze screen-state reason has already been applied to the
DisplayPowerRequest, so there's no need to set it back to DEFAULT.
Setting it to DEFAULT will effectively undo any reason set before.

Bug: 283014701
Test: manual
Change-Id: Ic7d6d214aa3793965f375ca8b3aa9699699ee8a5
1 file changed