Set SurfaceFlinger phase offset for HWC2 codepath

Test: Manual

Change-Id: I35b7ee7aa49d531f741f13b20b7cfa376598e193
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 25e76a1..e9ea7d8 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -89,6 +89,9 @@
 TARGET_USES_HWC2 := true
 TARGET_USES_HWC2ON1ADAPTER := true
 MAX_VIRTUAL_DISPLAY_DIMENSION := 2048
+VSYNC_EVENT_PHASE_OFFSET_NS := 2000000
+SF_VSYNC_EVENT_PHASE_OFFSET_NS := 6000000
+
 
 TARGET_AUX_OS_VARIANT_LIST := bullhead