Update references from .txt to .md when files have moved, a few other tweaks, no changes to code. Change-Id: I0bfd38c47b9fb0fc11ae98a0a674af66fb4c5a84
Change-Id: Ida104bcd66dee477d724f3c99a671e5d617177df
Bug: 68686 Change-Id: I1d93a91e62dfde6c9ab4fac887d6fb2b33e36a72