[automerger skipped] Merge "Refactor puller of {Mobile|Wifi}BytesTransfer(ByFgBg)" into rvc-dev am: e6c5da62 am: 37706428 -s ours
am skip reason: Change-Id If544dd5a1dfc10bc70bf381f79a938f7d6b1dcb7 with SHA-1 9f0146a5 is in history
Change-Id: I7582de089ce2ca8ac64503596dea9c5c2dc231fa