Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: Icd1bd10755cad3ab80ff48bbf22bcdbc01d31a78
diff --git a/Android.bp b/Android.bp
index b6a331b..8966e2f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -32,7 +32,7 @@
     crate_name: "downcast_rs",
     cargo_env_compat: true,
     cargo_pkg_version: "1.2.0",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {
@@ -51,7 +51,7 @@
     crate_name: "import_via_macro_use",
     cargo_env_compat: true,
     cargo_pkg_version: "1.2.0",
-    srcs: ["tests/import_via_macro_use.rs"],
+    crate_root: "tests/import_via_macro_use.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {
@@ -71,7 +71,7 @@
     crate_name: "use_via_namespace",
     cargo_env_compat: true,
     cargo_pkg_version: "1.2.0",
-    srcs: ["tests/use_via_namespace.rs"],
+    crate_root: "tests/use_via_namespace.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {
@@ -91,7 +91,7 @@
     crate_name: "downcast_rs",
     cargo_env_compat: true,
     cargo_pkg_version: "1.2.0",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2015",
     features: [
         "default",