Migrate pullWifiBytesTransferBackground

Bug: 145565211
Test: No Cts test. Ran adb shell cmd stats pull-source 10001
Change-Id: I8314a32b9fe256657c8a96eaec6ec652351d365d
1 file changed
tree: a89cbd5ce45ec777e0112c76112d02065c2c0f33
  1. apex/