Launch flag guarded always on optimized resource shrinking

This will use the RELEASE_USE_OPTIMIZED_RESOURCE_SHRINKING_BY_DEFAULT flag - default enabling in trunk staging will be done in a follow up cl

To disable optimized resource shrinking on an app basis one can opt out with
  optimized_shrink_resources: false
bug please file a bug for us to find out why (so that we can remove legacy mode)

Bug: 325905703
Test: Existing
Change-Id: Idb57b8e6bba26f06c044657492ff4ae89ec81254