Clean up LocalPendingInfo-using logic in Channel
Clean up LocalPendingInfo-using logic in Channel

Yes, the unit tests still pass. However, initial LPI doesn't still
actually work - test coverage should be improved as a fairly high
priority task. It should start working quite soon though.

freedesktop-unofficial-mirror/telepathy__telepathy-qt,detrout/telepathy-qt,anantkamath/telepathy-qt,detrout/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,special/telepathy-qt-upstream,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyIM/telepathy-qt,anantkamath/telepathy-qt,special/telepathy-qt-upstream,TelepathyIM/telepathy-qt,tiagosh/telepathy-qt,tiagosh/telepathy-qt,TelepathyQt/telepathy-qt,anantkamath/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,tiagosh/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,detrout/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,special/telepathy-qt-upstream,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyQt/telepathy-qt,TelepathyQt/telepathy-qt