This does not really work: even when it seems to, it compiles only
because of transitive includes

- Filter o3tl/typed_flags_set.hxx in f-u-u
- Remove already added fw declarations from hxx files and
  include full header just in case
- Remove now unnecessary blacklist entries

Change-Id: Ie0de6667af697095a623b435806449e7e28a6004
Reviewed-on: https://gerrit.libreoffice.org/64659
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>