The ActivityOptions bundle can hold additional information beyond the
animation details (such as the usage time report, launch, display id, etc). We
need to return a non-null Bundle even if we're using the default animations to
retain that information.
Test: Added in 8209c4bf
BUG: 34235073
Change-Id: If69edadb3f7ff937f07fc618bddbd10cf46666e6