display: config: Use P3 mode by default

Change-Id: Ida0f0d3e071e2bdbe4cf9b999ff0d9b52c6d4d2e
diff --git a/config/display-product.mk b/config/display-product.mk
index 97dedca..2ec896d 100644
--- a/config/display-product.mk
+++ b/config/display-product.mk
@@ -43,6 +43,7 @@
 PRODUCT_PROPERTY_OVERRIDES += \
     persist.demo.hdmirotationlock=false \
     persist.sys.sf.color_saturation=1.0 \
+    persist.sys.sf.color_mode=9 \
     debug.sf.hw=0 \
     debug.egl.hw=0 \
     debug.sf.latch_unsignaled=1 \