Delete DeviceInactiveCondition

Moves the logic to determine when to run lowlight into LowLightMonitor
and out of the condition monitor framework.

This logic can be simplified further, but just copying over the existing
logic to reduce risk of regression.

Bug: 407633926
Test: atest LowLightMonitorTest
Flag: EXEMPT refactor
Change-Id: I2f2f63b1dc97e34838b8cfa3194174c1120245f4