[DO NOT MERGE] Update raven SVN to 31

Bug: 231380374
Change-Id: I5a1072b5366bde0048937941d3f014bdf3c7019f
(cherry picked from commit e381ffc6fef7859dbf9fadb96ae16cc528a7f333)
Merged-In: I5a1072b5366bde0048937941d3f014bdf3c7019f
diff --git a/device-raven.mk b/device-raven.mk
index 7972bd5..22e8cee 100644
--- a/device-raven.mk
+++ b/device-raven.mk
@@ -187,7 +187,7 @@
 
 # Increment the SVN for any official public releases
 PRODUCT_VENDOR_PROPERTIES += \
-    ro.vendor.build.svn=30
+    ro.vendor.build.svn=31
 
 # Hide cutout overlays
 PRODUCT_PACKAGES += \