The current API allows to get all change comments and drafts, but as a
map of path names to lists of comment infos; the paths are not set in
the comment infos. This is not convenient for callers that just want a
list of all comments on the change; they have to transform the map to
a list, setting the path field on each element.
Add new methods that return the comments as a plain list, with paths
already set. This reduces the amount of code clients need to write.
Note that such methods already exist on the revision API.
Change-Id: Ic3fd48347d195ebbe361d32167dbaacb572f066d
f841099db5