Added RNFS and refactor image upload to use it

mobile/package-lock.json

@@ -2051,6 +2051,11 @@
         }
       }
     },
+    "base-64": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/base-64/-/base-64-0.1.0.tgz",
+      "integrity": "sha1-eAqZyE59YAJgNhURxId2E78k9rs="
+    },
     "base64-arraybuffer": {
       "version": "0.1.5",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz",
@@ -5214,6 +5219,15 @@
         "prop-types": "^15.5.10"
       }
     },
+    "react-native-fs": {
+      "version": "2.9.12",
+      "resolved": "https://registry.npmjs.org/react-native-fs/-/react-native-fs-2.9.12.tgz",
+      "integrity": "sha512-kppfQwMEmEerP9KImdzRi49ko0pmZtzHzIhpDSkjQVrpTPG7AEzYxdAqapaDveHM8CcN6tzqmiljrueqlBr1VA==",
+      "requires": {
+        "base-64": "^0.1.0",
+        "utf8": "^2.1.1"
+      }
+    },
     "react-native-image-picker": {
       "version": "0.26.7",
       "resolved": "https://registry.npmjs.org/react-native-image-picker/-/react-native-image-picker-0.26.7.tgz",
@@ -6682,6 +6696,11 @@
         }
       }
     },
+    "utf8": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/utf8/-/utf8-2.1.2.tgz",
+      "integrity": "sha1-H6DZJw6b6FDZsFAn9jUZv0ZFfZY="
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",