Control whether storage quota APIs will return static values

Controls how the Storage Quota APIs report the available quota to websites. When enabled, the Storage Quota APIs return a static quota value equal to the current usage plus the smaller of 10 GiB or the device's total storage rounded up to the nearest 1 GiB. When disabled, the Storage Quota APIs return a dynamic quota value that reflects the actual available device storage. When unset, the browser uses the default platform behavior. This policy does not affect sites with unlimited storage permissions or enforced quota settings.