* commit 'b65b2df6e421d0fc8516e933f52763ff172760f3': cherrypick Change-Id: Ie0c6540a3a6d86780718e2918b8dffcda37d925c docs: Rewrite of App Fundamentals.. Part 3 This introduces two new docs:
* commit 'b65b2df6e421d0fc8516e933f52763ff172760f3': cherrypick Change-Id: Ie0c6540a3a6d86780718e2918b8dffcda37d925c docs: Rewrite of App Fundamentals.. Part 3 This introduces two new docs: