Merge "cutils: only support safe list iteration." am: 52a21351 am:...

Merge "cutils: only support safe list iteration." am: 52a21351 am: 9c0b1f43 am: 5e74c2e9 am: 3346d8ba

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1879198

Change-Id: If38ae77c0eb3c61ac557d69ee34e83903be84247