Merge "[MS10.1] Move multiplySafeByRational to NetworkStatsUtils" am: 6ff6240694 am: 239ffb98df am: c12c9ad508 am: 499790f024

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

Change-Id: I4d415add75f300bd01ecfeb231c9edd9892b4d1f