Upstreamed update_prebuilts script so we can properly update androidx libraries (specifcally Compose) in tm-qpr-dev

Bug: 240473481
Change-Id: Ia2ffc929bfff813b258d14d76e323367491ab93a
Merged-In: Ia2ffc929bfff813b258d14d76e323367491ab93a
Test: None
diff --git a/update_prebuilts/prepend_androidx_license b/update_prebuilts/prepend_androidx_license
new file mode 100644
index 0000000..08daee2
--- /dev/null
+++ b/update_prebuilts/prepend_androidx_license
@@ -0,0 +1,15 @@
+
+// *** THIS PACKAGE HAS SPECIAL LICENSING CONDITIONS.  PLEASE
+//     CONSULT THE OWNERS AND opensource-licensing@google.com BEFORE
+//     DEPENDING ON IT IN YOUR PROJECT. ***
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "prebuilts_sdk_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    //   SPDX-license-identifier-OFL (by exception only)
+    //   SPDX-license-identifier-Unicode-DFS
+    default_applicable_licenses: ["prebuilts_sdk_license"],
+}
+