[RN] Update react-native-fetch-blob dependency

Maintainership changed, and in addition, they fixed the issue / warning about
non-UI thread initialization.

package-lock.json

       }
     },
     "react-native-fetch-blob": {
-      "version": "github:flatfox-ag/react-native-fetch-blob#01f38a4537baecd3ea0cb93c27e84553f3fc5231",
+      "version": "github:joltup/react-native-fetch-blob#1f9a1761aea4e37bd672bd0d233f3adf0e113a11",
       "requires": {
         "base-64": "0.1.0",
         "glob": "7.0.6"

package.json

     "react-native-background-timer": "2.0.0",
     "react-native-calendar-events": "github:jitsi/react-native-calendar-events#dabfabc4bacc1424a8b93ebdda6f3820dee198cb",
     "react-native-callstats": "3.50.4",
-    "react-native-fetch-blob": "github:flatfox-ag/react-native-fetch-blob#exception_fixes",
+    "react-native-fetch-blob": "github:joltup/react-native-fetch-blob#1f9a1761aea4e37bd672bd0d233f3adf0e113a11",
     "react-native-img-cache": "1.5.2",
     "react-native-immersive": "1.1.0",
     "react-native-keep-awake": "2.0.6",