Make apex availability of libjemalloc5 explicit am: 4552d1e842 am: 15df6342b3 am: 2a8d7364a5

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

Change-Id: I33e3557289d44e539cae4332a359a891d65338e4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>