Update protobuf to 2.27.1

Test: cd external/rust/crates && atest --host -c
Change-Id: Iaae5fc30f1bd87b2d4a92ee1ae07bc18e1bc50d4
diff --git a/METADATA b/METADATA
index 08ae782..2bcb504 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/protobuf/protobuf-2.25.1.crate"
+    value: "https://static.crates.io/crates/protobuf/protobuf-2.27.1.crate"
   }
-  version: "2.25.1"
+  version: "2.27.1"
   license_type: NOTICE
   last_upgrade_date {
-    year: 2021
-    month: 9
-    day: 22
+    year: 2022
+    month: 3
+    day: 1
   }
 }