Stability issue fixed in code, API disabled for browsers without fix applied

[Sam Dutton]

Reposted from the Intent to Experiment: Topics API group: we've discovered a stability issue with the Topics API and fixed the code, but the Topics API has been disabled in the Privacy Sandbox Ads APIs Origin Trial for users that aren't running a version of Chrome with the fix applied. 

It will take a couple of weeks for the updated Canary/Dev/Beta releases to propagate to the majority of users.