rust: Test with full Rust “crate_type”

What we call “static” in Soong is called “staticlib” in Rust, see
https://doc.rust-lang.org/reference/linkage.html for details.

Bug: 254469782
Test: atest
Change-Id: I65bba511d3ce8e7e53c6a1de3e77e30568934ce7

rust/library_test.go

@@ -45,7 +45,7 @@ func TestLibraryVariants(t *testing.T) {
 	rlibCrateType := "rlib"
 	dylibCrateType := "dylib"
 	sharedCrateType := "cdylib"
-	staticCrateType := "static"
+	staticCrateType := "staticlib"
 
 	// Test crate type for rlib is correct.
 	if !strings.Contains(libfooRlib.Args["rustcFlags"], "crate-type="+rlibCrateType) {