Upgrade to syn2 dep

Bug: 337204313
Test: VtsAidlKeyMintTargetTest
Change-Id: I48752bbcd46b7ff03c844039a2759c6dae18d0f6
diff --git a/derive/Android.bp b/derive/Android.bp
index 2e2c9ae..1e5c450 100644
--- a/derive/Android.bp
+++ b/derive/Android.bp
@@ -26,7 +26,7 @@
     rustlibs: [
         "libproc_macro2",
         "libquote",
-        "libsyn_deprecated",
+        "libsyn",
     ],
 }
 
diff --git a/derive/Cargo.toml b/derive/Cargo.toml
index fefeadb..9a21207 100644
--- a/derive/Cargo.toml
+++ b/derive/Cargo.toml
@@ -14,7 +14,7 @@
 [dependencies]
 proc-macro2 = "^1.0"
 quote = "^1.0"
-syn = { version = "^1.0", features = ["derive", "parsing"] }
+syn = { version = "2.0.38", features = ["derive", "parsing"] }
 
 [dev-dependencies]
 ciborium = { version = "^0.2.0", default-features = false }