Remove the constants for calculation window size

Bug: 346604998
Bug: 380858230
API-Coverage-Bug: 378780498
Flag: android.os.cpu_gpu_headrooms
Test: atest HeadroomTest PerformanceHintNativeTestCases \
            HintManagerServiceTest PowerHalWrapperAidlTest
Change-Id: I6cf59a95b144600b58b45cb491adb267d758970a
3 files changed