Right now it crashes because the ViewRoot expects to receive a
BLAST surface but the WindowlessWindowManager doesn't support it.
Adding support should be relatively trivial (coming in a follow-up)
but we haven't tested it yet so suggesting merging this patch for
today.
Bug: 150000636
Test: Existing tests pass
Change-Id: I4b36d190c8f4f022dada656e02452034113a4000
(cherry picked from commit b4727e0f55)
6d16c8c340