fix internal fancy mailtos

Mailto: links that included anything other than a "to" address weren't
handled correctly when a user clicked on one from within a message body.
Pass the entire 'mailto' URL to ComposeActivity to ensure our normal
mailto parsing code kicks in.

Bug: 12137171
Change-Id: I0352ecc80b7c9cfadeb605f8e0b2a694387c9b03
4 files changed