This method can be used by clients to better estimate if fetchRegion() is
expected to take very little time as the region is already cached or if it can
take a bit longer since there are multiple operations / longer running
operations needed to actually fetch the region.

In the case of MozillaLocationService if the region is not already cached the
process of fetching the region involves a REST call with a connect / read
timeout of 10 seconds.

Issue #7647: Add SessionFeature.release() to allow app to stop rendering engine sessions and release the current one.

It missed the 48 train, so moving it to 49 instead.

This fixes a mismatch in events extra keys and values

This reverts commit 59269364.