docs: Fix links to narrative guides am: a1796499 am: 675a14ea am: 5b73be65 am: 9e941b86

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15738642

Change-Id: I417e6c4f53d496dbdd8c2313e4c9e64dad21d22e