Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I851b567a909a71967ea71aa363671afc861636c8
diff --git a/Android.bp b/Android.bp
index b2327de..26dd152 100644
--- a/Android.bp
+++ b/Android.bp
@@ -45,7 +45,7 @@
     crate_name: "num_cpus",
     cargo_env_compat: true,
     cargo_pkg_version: "1.16.0",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2015",
     rustlibs: ["liblibc"],
     apex_available: [
@@ -66,7 +66,7 @@
     crate_name: "num_cpus",
     cargo_env_compat: true,
     cargo_pkg_version: "1.16.0",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {