Second parameter is required to add PixelStateResidencyDataProvider.
If display entity name is empty, the device doesn't support display
VRR power stats.
Bug: 335379104
Test: dumpsys android.hardware.power.stats.IPowerStats/default
Change-Id: Id70ce01ef50a56d690c0942ae7e2ac2560abc435
Signed-off-by: Darren Hsu <darrenhsu@google.com>