b/11174975
There are already several database fixing steps that
occur when the database is opened, add another one
to correct uninitialzed mailbox parent keys.
This is because we use a two pass system for adding
mailbox rows, first to insert the rows, and second to
assign parentKeys to child rows. We need two passes
because we may insert a child row before its parent,
so the parent's rowId is unavailble. But if the process
dies before the second step is complete we'll be in
an inconsistent state.
Change-Id: Ifaeeaca7e82c1e99656033bc1a9f25d7acb67517
f7078466c3