fix custom reply-from when composing from scratch

Previously, new messages would always use the base account
email when composing from scratch.

Fixing that exposed another issue where composing a new message
could select a reply-from from a different account. Fix that by
only looking through the current account's reply-from addresses.

Bug: 7442437
Change-Id: I6e73aa89c7282e7141e15920be0de6def8f39d36
1 file changed