Update coral SVN to 20

Bug: 151752725
Change-Id: I28bb22e920551742bab07a1cffcf8109965ef4b4
diff --git a/device.mk b/device.mk
index 013a3ef..7fdf7d1 100644
--- a/device.mk
+++ b/device.mk
@@ -944,7 +944,7 @@
 
 # Increment the SVN for any official public releases
 PRODUCT_PROPERTY_OVERRIDES += \
-	ro.vendor.build.svn=19
+	ro.vendor.build.svn=20
 
 PRODUCT_COPY_FILES += \
     $(LOCAL_PATH)/powerhint.json:$(TARGET_COPY_OUT_VENDOR)/etc/powerhint.json