IIUC it doesn’t make a difference as I don’t personally care about copyright. it only affects contributors as they need to sign a [[cla]] (one time only) to contribute to [[agora server]] or [[agora bridge]].
by this I mean: as far as I can tell the only outcome from Google holding copyright for the Agora code ([[agora server]], [[agora bridge]]) is that 1. they choose the license, 2. they choose where the primary repos are to be hosted, 3. they require me to check for a signed [[cla]] before accepting contributions.