b/16322573
EmailConversationCursor was not populating the firstUnreadSnippet and
lastSnippet values in ConversationInfo. When they remain null and are
subsequently set as the snippet text, it effectively removes the snippet.
Change-Id: I1c17508bbc8857d00d8678dca4a7ad791dcae049
EmailConversationCursor eagerly marks all messages in the current mailbox
as being seen. Most of the time it is a redundant operation, but nothing
prevents the provider from broadcasting notifications and all of the
observers from dutifully reacting to the notification. A good deal of
work is avoided now that we only notify when rows in our database have
actually been altered.
Change-Id: Ie91e6aebaf9c2899510f3818586d582073954d16
Add markContentsSeen() and emptyFolder() to EmailConversationCursor.
Add 'purge folder' URI for delete() call in EmailProvider.
Change-Id: I2f65f877f8f4e8376eb5c2149b5051931c2ac083
James Lemieux