make Netflix 1080p Firefox work again

* updated cadmium-playercore-1080p.js and get_manifest.js from truedread/netflix-1080p
* in those files: changed references to use6Channels to window.use6Channels so it won't carsh if not defined
* background.js: instead of redirecting to the changed player core replacing the request body so there are no CORS errors
* include aes.js and sha.js in the add-on (freezing version, no web request that can potentially have CORS errors)
Probably only the changes in background.js did the trick, but

Author: Linux Netflix User

src/aes.js

@@ -1,9 +1,17 @@
 browser.webRequest.onBeforeRequest.addListener(
   function(details) {
-    return {
-      //redirectUrl: browser.extension.getURL("cadmium-playercore-5.0008.544.011-1080p.js")
-      redirectUrl: browser.extension.getURL("cadmium-playercore-1080p.js")
+    let filter = browser.webRequest.filterResponseData(details.requestId);
+    let encoder = new TextEncoder();
+  
+    filter.ondata = event => {
+      fetch(browser.extension.getURL("cadmium-playercore-1080p.js")).
+        then(response => response.text()).
+        then(text => {
+          filter.write(encoder.encode(text));
+          filter.disconnect();
+        });
     };
+    return {};
   }, {
     urls: [
       "*://assets.nflxext.com/*/ffe/player/html/*",