Prepare repository for RuboCop

'rubocop --auto-gen-config' has a bug which cause a style to be enabled
in the todo file when it should really be disabled. Hence manually
disabled Style/MultilineOperationIndentation.

Filled upstream as:
https://github.com/bbatsov/rubocop/issues/1449

Bug: 72841
Change-Id: I5a2007de1f62d5d82910319a918728b499929996
Merge "Prepare repository for RuboCop"