[automerger skipped] Clear mod-union tables for immune spaces in PreZygoteFork am: 0992003fec -s ours

am skip reason: Merged-In I2bd0286da765f414bc22cf55af3efb84c55ce6c2 with SHA-1 157084ac62 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/art/+/21167853

Change-Id: I07a8a72170695cc5bb117a04e53a35e7bc02f716
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>