Expose configGroup to DisplayConfig

Bug: 149784270
Test: Simulate multiple config with debug change ag/10355181
Change-Id: Id78013918c2f4a30abfe68d458b4d0a1f8147070
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index f3755f4..1d00624 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -853,6 +853,7 @@
         const auto offsets = mPhaseConfiguration->getOffsetsForRefreshRate(config.refreshRate);
         config.appVsyncOffset = offsets.late.app;
         config.sfVsyncOffset = offsets.late.sf;
+        config.configGroup = hwConfig->getConfigGroup();
 
         // This is how far in advance a buffer must be queued for
         // presentation at a given time.  If you want a buffer to appear