axolotl: enable support for background blur

Test: atest librenderfright_test

Change-Id: I31d5ce00e175ec6b8208c301a04a2978647a2fec
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
diff --git a/device.mk b/device.mk
index 060c72e..f2ec94c 100644
--- a/device.mk
+++ b/device.mk
@@ -294,6 +294,13 @@
     $(LOCAL_PATH)/configs/gps/sap.conf:$(TARGET_COPY_OUT_VENDOR)/etc/sap.conf \
     $(LOCAL_PATH)/configs/gps/xtwifi.conf:$(TARGET_COPY_OUT_VENDOR)/etc/xtwifi.conf \
 
+# Graphics
+
+## Enable blur
+PRODUCT_PRODUCT_PROPERTIES += \
+    ro.sf.blurs_are_expensive=1 \
+    ro.surface_flinger.supports_background_blur=1 \
+
 # Health
 PRODUCT_PACKAGES += \
     android.hardware.health@2.1-impl:64 \