Update SVN to 12 for June RoW Walleye/Taimen build
Bug:78240102
(cherry picked from commit 7c3e60f1fd7573220a980e26a81fd5cbd2819270)

Change-Id: I9fce04f5abfff686c65b756b45ade6c18b987c05
diff --git a/device.mk b/device.mk
index c0ebfe9..a200e0c 100755
--- a/device.mk
+++ b/device.mk
@@ -23,7 +23,7 @@
 
 # Set the SVN for the targeted MR release
 PRODUCT_PROPERTY_OVERRIDES += \
-    ro.vendor.build.svn=11
+    ro.vendor.build.svn=12
 
 # Enforce privapp-permissions whitelist
 PRODUCT_PROPERTY_OVERRIDES += \