Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I3709f23d8a8e193b0278605a76c9ceb1ea9dc00d
diff --git a/Android.bp b/Android.bp
index 76c2d1b..4587f07 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,5 +1,7 @@
 // This file is generated by cargo_embargo.
-// Do not modify this file as changes will be overridden on upgrade.
+// Do not modify this file after the first "rust_*" or "genrule" module
+// because the changes will be overridden on upgrade.
+// Content before the first "rust_*" or "genrule" module is preserved.
 
 // TODO: Add license.
 rust_library {
@@ -8,7 +10,7 @@
     crate_name: "siphasher",
     cargo_env_compat: true,
     cargo_pkg_version: "1.0.1",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     features: [
         "default",
@@ -28,7 +30,7 @@
     crate_name: "siphasher",
     cargo_env_compat: true,
     cargo_pkg_version: "1.0.1",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     test_options: {