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

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

Change-Id: I65650e6b2f28e71c1177cd268cd908d6118adf0c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>