
Did not do this optimisation for `AdPlaybackState.AdGroup` as its length is zero for `AdPlaybackState` with no ads. No need to pass default values while fetching keys, which we always set in `AdPlaybackState.AdGroup.toBundle()`. PiperOrigin-RevId: 496995048 (cherry picked from commit f2eac2df711cad579f3042568a24c1f51a119428)