Add third_party/android_sdk/LICENSE to generate_licenses.py.

This should fix the Chromium Roll (first breakage:
https://webrtc-review.googlesource.com/c/src/+/130341/).

No-Tree-Checks: True
Bug: None
Change-Id: Ib90451488e65df0bca5cc4f6ce548652de5dcd24
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130461
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27353}

tools_webrtc/libs/generate_licenses.py

@@ -34,6 +34,7 @@ import subprocess
 # (right after the `third_party/` prefix)
 LIB_TO_LICENSES_DICT = {
     'abseil-cpp': ['third_party/abseil-cpp/LICENSE'],
+    'android_sdk': ['third_party/android_sdk/LICENSE'],
     'android_tools': ['third_party/android_tools/LICENSE'],
     'auto': ['third_party/auto/src/LICENSE.txt'],
     'bazel': ['third_party/bazel/LICENSE'],