Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: Ib187828b8f4d41e94eb138fe90b93d8d19108821
diff --git a/0.3.3/Android.bp b/0.3.3/Android.bp
index 438d373..561348f 100644
--- a/0.3.3/Android.bp
+++ b/0.3.3/Android.bp
@@ -45,7 +45,7 @@
     crate_name: "heck",
     cargo_env_compat: true,
     cargo_pkg_version: "0.3.3",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {
@@ -61,7 +61,7 @@
     crate_name: "heck",
     cargo_env_compat: true,
     cargo_pkg_version: "0.3.3",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     rustlibs: ["libunicode_segmentation"],
     product_available: true,