Add CTS tests for setDisplayPowerState()

Bug: 243946819
Test: atest CarPowerManagerTest
Change-Id: I83cccee2e0913d47186c331de4aa6662090f9e9c
Merged-In: I83cccee2e0913d47186c331de4aa6662090f9e9c
(cherry picked from commit 8de0754b35c07b77ee881ad53d9021441ef65cfa)
2 files changed