I would totally want this too, but legally, can Google do something here when they are not a party in this litigation?
They could also take the first app developer to get sued under the patent and pay for them to file a CBM review. Or file an IPR or PGR in their own right seeking to invalidate the patent.
IANAL, but I suspect this is exceedingly rare.
Plus Google can claim litigation costs.
Also clearly there is a damage to reputation of the Google, since we are discussing here that they need to get involved in this case. I am not sure if they can get compensated for that as well.