Revert "Uprev remote-shell to 6 and aura-shell to 63"

This reverts commit d068064e66fe3efea21c9cb49113133e5057e924.

Reason for revert: The CL is considered a culprit of b/315726892

Change-Id: I19f82be0c42b9294b15fe13de794a817acd674fb
2 files changed