[LSC] Add LOCAL_LICENSE_KINDS to system/librustutils

Added SPDX-license-identifier-Apache-2.0 to:
  Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I270e59359a796642ae5951c0190427cc095058ca
diff --git a/Android.bp b/Android.bp
index c0f3ee1..56a817a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,3 +1,7 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 rust_library {
     name: "librustutils",
     crate_name: "rustutils",