Add flags to conversation columns and add the personal indicator flag.

Flag -> used by email; if there is no flag view conversationitemview
shows nothing
personal indicator -> used by gmail; if there is no personal indicator
flag, then conversationitemview shows nothing.

Leave low/ high in for now to avoid breaking the build.
Move email/ gmail provider over THEN get rid of this.
Change-Id: I0807ddf38ae660d7bd99ffa55bde78e42479ed76
2 files changed