Force GC before collecting inline caches in 2271-profile-inline-cache.

Bug: 317505124
Test: -
  1. Limit the test on a single little core.
  2. art/test/testrunner/testrunner.py --target --64 test-art-target-run-test-ndebug-prebuild-jit-no-relocate-ntrace-gcstress-checkjni-picimage-ndebuggable-no-jvmti-cdex-fast-2271-profile-inline-cache64
Change-Id: I1979e018145a0d546a0c2cba5973800f860290ff