networking: Initialize NetworkingModule with proper OkHttpClient.

`getOkHttpClient` calls `createClient` if `OkHttpClientProvider` has
no sClient (the root client) yet. Otherwise, it returns the root client.
Thus, it has basically the same effect as `createClient` in this case,
since only one NetworkingModule is ever instantiated and sharing its
client with the very few other instances where OkHttpClientProvider is
used shouldn't be a problem.

We need this change so that OkHttpClientProvider gets an initialized
sClient (`createClient` doesn't initialize the sClient, it just returns
a new client). This will be necessary in the next commit, which fixes
a networking bug.

Author: roberthoenig

ReactAndroid/src/main/java/com/facebook/react/modules/network/NetworkingModule.java

@@ -161,7 +161,7 @@ public interface ResponseHandler {
    * @param context the ReactContext of the application
    */
   public NetworkingModule(final ReactApplicationContext context) {
-    this(context, null, OkHttpClientProvider.createClient(), null);
+    this(context, null, OkHttpClientProvider.getOkHttpClient(), null);
   }
 
   /**
@@ -172,7 +172,7 @@ public NetworkingModule(final ReactApplicationContext context) {
   public NetworkingModule(
     ReactApplicationContext context,
     List<NetworkInterceptorCreator> networkInterceptorCreators) {
-    this(context, null, OkHttpClientProvider.createClient(), networkInterceptorCreators);
+    this(context, null, OkHttpClientProvider.getOkHttpClient(), networkInterceptorCreators);
   }
 
   /**
@@ -181,7 +181,7 @@ public NetworkingModule(
    * caller does not provide one explicitly
    */
   public NetworkingModule(ReactApplicationContext context, String defaultUserAgent) {
-    this(context, defaultUserAgent, OkHttpClientProvider.createClient(), null);
+    this(context, defaultUserAgent, OkHttpClientProvider.getOkHttpClient(), null);
   }
 
   @Override
@@ -277,7 +277,6 @@ public void sendRequest(
     }
 
     OkHttpClient.Builder clientBuilder = mClient.newBuilder();
-
     if (!withCredentials) {
       clientBuilder.cookieJar(CookieJar.NO_COOKIES);
     }