Copy description from Cargo.toml to METADATA am: 25652a4c1e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/syn-mid/+/1457156

Change-Id: Ic3944d9ed3e5c67e3d506ecf57bc4c8a969adfc1
diff --git a/METADATA b/METADATA
index 4500ae0..5029778 100644
--- a/METADATA
+++ b/METADATA
@@ -1,5 +1,5 @@
 name: "syn-mid"
-description: "Providing the features between \'full\' and \'derive\' of syn."
+description: "Providing the features between \"full\" and \"derive\" of syn."
 third_party {
   url {
     type: HOMEPAGE