Update Android.bp by running cargo_embargo

Test: ran cargo_embargo
Change-Id: I0b47170b22227c7715ad72c13adad988a80cd99d
diff --git a/Android.bp b/Android.bp
index dd7f39a..aff3e66 100644
--- a/Android.bp
+++ b/Android.bp
@@ -26,7 +26,7 @@
     crate_name: "plotters",
     cargo_env_compat: true,
     cargo_pkg_version: "0.3.5",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     features: [
         "area_series",