Merge "Move Data Stall logic to CS from NetworkMonitorCallbacks." am: 8a38affcbf am: 07b9ebd24f

Change-Id: I3b6facc6220c5818565fc8d0ed3d1cad4bede2af
tree: 3591f5c799f979d9b7c9c2b04e6e1b5331d71202
  1. core/
  2. services/
  3. tests/