Update the Rust prebuilt version number to 1.55.0

Bug: 199547393
Test: m rust
Change-Id: I05831a107b46019205c0a7d530b6f2a3b1beba75
diff --git a/rust/config/global.go b/rust/config/global.go
index e5b334d..b163bb6 100644
--- a/rust/config/global.go
+++ b/rust/config/global.go
@@ -24,7 +24,7 @@
 var pctx = android.NewPackageContext("android/soong/rust/config")
 
 var (
-	RustDefaultVersion = "1.54.0"
+	RustDefaultVersion = "1.55.0"
 	RustDefaultBase    = "prebuilts/rust/"
 	DefaultEdition     = "2018"
 	Stdlibs            = []string{