Introducing clampers to DPC

Introduced base BrightnessClamper and BrightnessClampersContorller - aggregator for all future clampers. DeviceConfig string parsing code is moved to DeviceConfigParsingUtils and generalised for similar structure parsing.

Bug: b/263362199
Test: atest com.android.server.display.utils atest com.server.display.brightness
Change-Id: Ifcc94abb04ad6d049f8acde1d6e9bda849b45022
10 files changed