8081a2dc80
The prefFlips feature was not caching the original (pre-experiment) values for the prefs it was setting anywhere that would survive a restart. We now store these on the enrollment in the store under `enrollment.prefFlips.originalValues`. This storage is similar, but not identical, to the `prefs` storage, which is used to cache information about `setPref` experiments. That storage cannot be repurposed for this without intertwining the Nimbus-owned setPref support and the prefFlips feature. Differential Revision: https://phabricator.services.mozilla.com/D216445