Implement foreach to iterate over system properties am: dde9351666 am: 838025e15c Original change: https://googleplex-android-review.googlesource.com/c/platform/system/librustutils/+/18296376 Change-Id: Ibc62db99651956856c94546abd720c63304d8355 Signed-off-by: Automerger Merge Worker <[email protected]>