Don't escape and decode network response payloads

Summary:
This was originally done in https://github.com/facebook/flipper/pull/377 to support chinese characters, but it's not clear how it works, or what problem specifically it is trying to solve.

It's causing some problems where valid responses are failing to be "decoded", so I'm removing it.

Reviewed By: mweststrate

Differential Revision: D22866879

fbshipit-source-id: a19a57b0ddba2b9f434eb3c37e6b92da1dfbef01

desktop/plugins/network/utils.tsx

@@ -31,9 +31,7 @@ export function decodeBody(container: Request | Response): string {
       return decompress(b64Decoded);
     }
 
-    // Data is transferred as base64 encoded bytes to support unicode characters,
-    // we need to decode the bytes here to display the correct unicode characters.
-    return decodeURIComponent(escape(b64Decoded));
+    return b64Decoded;
   } catch (e) {
     console.warn('Discarding malformed body, size: ' + b64Decoded.length);
     return '';