Fix system_weak_test 2: GSS

A recent change made the GSS collector also send the broadcast event.
This caused the system_weak_test to fail when run with this collector.

Test: ./art/test/testrunner/run_build_test_target.py -j50 art-gtest-gss-gc
Test: ./art/test/testrunner/run_build_test_target.py -j50 art-gtest-gss-gc-tlab
Bug: 76205593
Change-Id: Ic331c7710cb07d8cfc39a8a9eab94cccaa9d7bd1
1 file changed