Fix java/fuzz_test.go post submit build breakage

Context
- Fix build breakage in aosp-build-tools for darwin targets

Test: m
Bug: b/260020491
Change-Id: I892876cf1567b4464e86daca0b305510da0ab2fd

java/fuzz_test.go

@@ -88,7 +88,7 @@ func TestJavaFuzz(t *testing.T) {
 
 	expected := "lib64/libjni.so"
 	if runtime.GOOS == "darwin" {
-		expected = "libjni.dylib"
+		expected = "lib64/libjni.dylib"
 	}
 
 	fooJniFilePaths := foo.jniFilePaths