Fix IsMarked() returning null for recently allocated large-object

Like in the case of non-moving-space, we need to switch to using live-
bitmap for large-object-space as well after sweeping it. Otherwise,
IsMarked() will return nullptr for a recently allocated large-object.

Flag: EXEMPT BUGFIX
Bug: 454165081
Test: art/test/testrunner/testrunner.py --host
Change-Id: Ie09f7d38fd4b4fefe81e9053bb5a98f5a14d5660