Title: Priority order of Compressors (Brotli, Gzip)

Description:
When configuring envoy we would like to have Brotli prioritized over Gzip if its in the Accept-Encoding header in any order. Is there a way to prioritize Brotli even if the header comes through with the order gzip,br. Currently it will see that gzip is supported and it will just use it. This comes into play with iOS devices as from apple their default value for this header is gzip,deflate,br and it will never use Brotli due to this ordering. Any help would be appreciated.