Handle case of no closing surfaces in origin launch

This can happen if the launch is a trampoline/translucent task.
It's not the ideal origin transition scenario, but we can still
accommodate and just not include closing surface (because there
is none)

Bug: b/330346132
Test: manual tile launch
Flag: com.google.wear.sdk.enable_origin_transitions
Change-Id: If9d4639f77b4bd8b0102aa5af638db0cf4c6f710