Fix a parameter type in NativeNetworkingAndroidSpec

Summary:
`responseType` should be a string, not an Object (which gets converted to a NativeMap by TM).

Changelog: [General] [Fixed] Fix the flow type for NativeNetworkingModule

Reviewed By: fkgozali

Differential Revision: D18019418

fbshipit-source-id: 316470ca82241223eafb5b05a54fc2bbf3074821

Libraries/FBReactNativeSpec/FBReactNativeSpec/FBReactNativeSpec.h

@@ -1598,7 +1598,7 @@ namespace JS {
           requestId:(double)requestId
             headers:(NSArray *)headers
                data:(NSDictionary *)data
-       responseType:(NSDictionary *)responseType
+       responseType:(NSString *)responseType
 useIncrementalUpdates:(BOOL)useIncrementalUpdates
             timeout:(double)timeout
     withCredentials:(BOOL)withCredentials;

Libraries/Network/NativeNetworkingAndroid.js

@@ -22,7 +22,7 @@ export interface Spec extends TurboModule {
     requestId: number,
     headers: Array<Header>,
     data: Object,
-    responseType: Object, // TODO: Use stricter type.
+    responseType: string,
     useIncrementalUpdates: boolean,
     timeout: number,
     withCredentials: boolean,

ReactAndroid/src/main/java/com/facebook/fbreact/specs/NativeNetworkingAndroidSpec.java

@@ -37,8 +37,8 @@ public abstract class NativeNetworkingAndroidSpec extends ReactContextBaseJavaMo
 
   @ReactMethod
   public abstract void sendRequest(String method, String url, double requestId,
-      ReadableArray headers, ReadableMap data, ReadableMap responseType,
-      boolean useIncrementalUpdates, double timeout, boolean withCredentials);
+      ReadableArray headers, ReadableMap data, String responseType, boolean useIncrementalUpdates,
+      double timeout, boolean withCredentials);
 
   @ReactMethod
   public abstract void addListener(String eventName);