There is a newly added condition to help advancing between SSAI ads
and content in case the ad group position or ad duration changed. The
condition currently doesn't check directly whether it's a SSAI
transition but relies on indrect signals. Making this more direct
helps to understand the purpose and avoid unintentional bugs where
this condition would apply in other cases too.
In addition, we need to exclude TextRenderer from the check because
its read position doesn't correspond to the actual decode position
since the decoding happens in the renderer itself (b/181312195).
PiperOrigin-RevId: 374835985
8eb990e47a