Update lynx SVN to 21

Bug: 302612466
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:02c0ddcf511b8177fcef205a9c030976c76ef260)
Merged-In: Id418cfb0934077258b796552b0ff376ca8dde30e
Change-Id: Id418cfb0934077258b796552b0ff376ca8dde30e

device-lynx.mk

@@ -203,7 +203,7 @@ PRODUCT_VENDOR_PROPERTIES += \
 
 # Increment the SVN for any official public releases
 PRODUCT_VENDOR_PROPERTIES += \
-    ro.vendor.build.svn=20
+    ro.vendor.build.svn=21
 
 # Set support hide display cutout feature
 PRODUCT_PRODUCT_PROPERTIES += \