Ensure recent documents are trimmed when relaunching.

With respect to recents trimming, documents excercise a
a special code path, where the number of open documents
is compared to a configured max documents. In fact though
if we have mandated a trim (regardless of recents size)
we don't care about this max documents number.

Bug: 24717461
Change-Id: I2ffb4a037307d666ea0a7f31d75638b64b6eab8e