Merge "[MS10.2] Move multiplySafeByRational to NetworkStatsUtils" am: c6f89d4832 am: c407c3315f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1919247

Change-Id: Iba3923aba315afcc5b3158b09e6ef89200a0b2c2