Make apex availability of libjemalloc5 explicit am: 4552d1e842 am: 15df6342b3

Original change: https://android-review.googlesource.com/c/platform/external/jemalloc_new/+/2898089

Change-Id: If11e72d0028ee5400fb37a5a409d8ed73f9c7df5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>