Update the given proposal to resume serving. This method will set the DealServingMetadata.DealPauseStatus.has_buyer_paused bit to false for all deals in the proposal.
Note that if the hasSellerPaused bit is also set, serving will not resume until the seller also resumes.
It is a no-op to resume an already-running proposal. It is an error to call proposals.resume for a proposal that is not finalized or renegotiating.
HTTP request
POST https://adexchangebuyer.googleapis.com/v2beta1/accounts/{accountId}/proposals/{proposalId}:resume