Migrate 26 crates to monorepo

tokio-util
tower
tower-layer
tower-service
tracing
tracing-attributes
tracing-core
tracing-subscriber
try-lock
tungstenite
twox-hash
ucd-trie
unicode-bidi
unicode-normalization
unicode-segmentation
unicode-width
unsafe-libyaml
userfaultfd
utf-8
uuid
weak-table
webpki
which
winnow
x509-cert
xml-rs

Bug: http://b/339424309
Test: treehugger
Change-Id: I2de1cd4ee620b480427cb36d312669bf66f1d29b

Android.bp

diff --git a/Android.bp b/Android.bp
index fc96d72..96beb97 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,38 +1 @@
-// This file is generated by cargo_embargo.
-// Do not modify this file because the changes will be overridden on upgrade.
-
-package {
-    default_applicable_licenses: ["external_rust_crates_userfaultfd_license"],
-}
-
-license {
-    name: "external_rust_crates_userfaultfd_license",
-    visibility: [":__subpackages__"],
-    license_kinds: ["SPDX-license-identifier-Apache-2.0"],
-    license_text: ["LICENSE"],
-}
-
-rust_library {
-    name: "libuserfaultfd",
-    host_supported: true,
-    crate_name: "userfaultfd",
-    cargo_env_compat: true,
-    cargo_pkg_version: "0.7.0",
-    crate_root: "src/lib.rs",
-    edition: "2018",
-    features: ["default"],
-    rustlibs: [
-        "libbitflags",
-        "libcfg_if",
-        "liblibc",
-        "libnix",
-        "libthiserror",
-        "libuserfaultfd_sys",
-    ],
-    apex_available: [
-        "//apex_available:platform",
-        "//apex_available:anyapex",
-    ],
-    product_available: true,
-    vendor_available: true,
-}
+// This crate has been migrated to external/rust/android-crates-io.

cargo_embargo.json

diff --git a/cargo_embargo.json b/cargo_embargo.json
deleted file mode 100644
index cb908d7..0000000
--- a/cargo_embargo.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "run_cargo": false
-}