[Android][3PPWM] Example AutofillService implementation

This is not a part of Chromium and users shouldn't need to
interact with this test app. This prototype helps debugging
how AutofillServices see viewStructures generated by Chromium.

The dependency to androidx.autofill landed in crrev.com/c/6172794.
Until androidx rollers picked it up, refetch the androidx
dependency by executing:
`python3 third_party/androidx/fetch_all_androidx.py`.

Change-Id: I87b680460ace16c3619e2ba90b5a1cd87a55d388
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6076641
Commit-Queue: Friedrich Hauser <[email protected]>
Reviewed-by: Ivana Žužić <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1407206}
diff --git a/BUILD.gn b/BUILD.gn
index a242f47..918d7bb 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -435,6 +435,7 @@
           "//chrome/android:chrome_public_test_apk",
           "//chrome/android:chrome_public_unit_test_apk",
           "//chrome/browser/android/examples/custom_tabs_client:custom_tabs_client_example_apk",
+          "//chrome/browser/android/examples/inline_autofill_service:inline_autofill_service_example_apk",
           "//chrome/browser/android/examples/partner_browser_customizations_provider:partner_browser_customizations_example_apk",
           "//content/shell/android:content_shell_test_apk",
         ]