We always switched to combined view when we tapped "Starred" in a
mailbox list. This was confusing since tapping to show the mailbox list
will take you to the mailbox list for the combined view, even if there's
only one account on the device! Other confusing things happened like
showing coloured account chips, even if there's only one account.
This fixes it so that we pass the account ID when building the
selection. Lots of wiring to make it happen, but very little change
overall.
Bug: 5388326
Change-Id: I1fe52f211cceca0c1b26581e200f3c7adcd0734a
513486cfb5