docs: Fixing broken {docroot} links am: edaf387f am: 13713355 am: 2acd7668

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



Change-Id: I38b6179222077fea7a61c641f25307c1905d6f93
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>