Merge "Refactor the android_mallopt code." into main am: d0745439d0 am: 5f6b7d806c

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3341442

Change-Id: I72580a3cff3b98d5f06a0ae5e44b415b5d93ee1a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>