Merge "[MS10.1] Move multiplySafeByRational to NetworkStatsUtils" am: 6ff6240694 am: 239ffb98df am: c12c9ad508

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1920477

Change-Id: I6bff9f75d9426978d2d4077a3bc54d5c0cb0fe4a