Inserts Havana logical architecture diagram

Change-Id: Id84a22f92757863831d341a74e5237b07b176707
Closes-Bug: 1292867
Fixes chose to/ choose to typo

Change-Id: Ied65fc0eddbc280a5314a12e14fae6d1cab641a0
Closes-Bug: 1292873
Merge "Inserts Havana logical architecture diagram"