Merge "NetworkStats: Avoid Division By 0" am: e22278838e

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1810678

Change-Id: I5bdeb5bba3613bc4891ff2c1e108d6f1a334eaad
tree: 3893e1f7a0d54059819aab4b9cd6a06b5b79b21c
  1. core/
  2. services/