Fix `CanUseKnownBootImageVarHandle()`, part 2.

(cherry picked from commit c05a32a746812f16914958bf8769cb6537d3af40)

Test: Rely on TreeHugger.
Bug: 191765508
Bug: 230729606
Merged-In: I1955b542cb7c28378aa588cd16e66eb5ffc33c8a
Change-Id: Ib72a2a6516c7a06758abb63a7d281b2f396fe691
1 file changed