Merge ag/3722536 from master to pi-dev.

Add dump information in vr_hwc, so that it provides
2d-VR layer information in dumpsys.

Bug: 73006422
Test: Manual test. "adb shell dumpsys SurfaceFlinger" prints out dump
information.

Change-Id: Id110c3e90004b4df8c47521e217e0c2024dcc02e