Update Android.bp by running cargo_embargo am: c75185d5f0

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/hex/+/3092473

Change-Id: Ibea47449a6f70d0e4dee81984188b27bb8a68db5
Signed-off-by: Automerger Merge Worker <[email protected]>
diff --git a/Android.bp b/Android.bp
index e65e78d..f353e8d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -46,7 +46,7 @@
     crate_name: "hex",
     cargo_env_compat: true,
     cargo_pkg_version: "0.4.3",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     features: [
         "alloc",
@@ -66,7 +66,7 @@
     crate_name: "hex",
     cargo_env_compat: true,
     cargo_pkg_version: "0.4.3",
-    srcs: ["src/lib.rs"],
+    crate_root: "src/lib.rs",
     edition: "2018",
     features: ["alloc"],
     apex_available: [