Merge "[MS39.1] Remove the looper from NetworkStatsSubscriptionMonitor" am: a8dd1f55ac am: f9d029bebd am: 8c60b78c1f

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1936448

Change-Id: If55a1ef029f5c4f5637fff4954eb1429a613cea7