Android: AppHooks->ServiceLoader for AccountManagerFacadeProvider

Bug: 40901855
Change-Id: I8ecba2cf1f6aa5f3054bbecd8023959813e3adee
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5738736


Owners-Override: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Sam Maier <smaier@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1342968}