define permission persistence
fixes https://www.w3.org/Bugs/Public/show_bug.cgi?id=22214
built from https://github.com/fluffy/webrtc-w3c/pull/33
fix permissions management of mediadeviceinfo access
integrating input from https://www.w3.org/Bugs/Public/show_bug.cgi?id=25245
Merge branch 'bug22214-permissions-persist' of https://github.com/dontcallmedom/mediacapture-main into dontcallmedom-bug22214-permissions-persist
Introduced filteredList to keep resultList unmodified (resultList becomes oldList in next invocation).
Added change log entry.
Merge branch 'dontcallmedom-bug22214-permissions-persist'