docs: Fixing broken {docroot} links am: edaf387f07

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20832854

Change-Id: I4b73f7210a19d023538eb770cdf65a128d71561c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>