Stripped down view for email that uses no javascript.

TODO: push message header off the top of the screen like browser url bar
TODO: use spinner in the secureconversationviewfragment while waiting for the page to load;
should be able to push logic to the AbstractConversationViewFragment
fixees b/6383847 Implement secure/sanitized conversation view for unsanitized message content from IMAP and POP servers
Change-Id: I03299a2d193ad1dc8fb5cc509eaf5d9f3dae6b0f
9 files changed