[power-based-throttling] device config changes.

This change adds the new device config changes needed
for supporting power-based throttling.

This mainly consists of
1. A new map from thermal status -> power quota for display.
2. Power based throttling parameters for finetuning.

Bug: 261221454
Test: Added new tests in DisplayDeviceConfigTest
Change-Id: Ic3c57159f1d99ea91b4061af21dd4f9f6db9b11e