am dd0c5587: Taking into account user join preference more aggressively; add debug info for roaming Bug:17669859 Big:17651877

* commit 'dd0c558776fcfba3f754bb0cd6533f2c9c23ec1e':
  Taking into account user join preference more aggressively; add debug info for roaming Bug:17669859 Big:17651877
tree: 2e5551836b7c4e917ab1e14dac8f26da44848617
  1. service/