Removed fetching app configuration data before calling FB.Init

Summary:
Removed fetching app configuration data before calling FB.Init in BaseActivity.java.

Seems like old UnityEngine versions had issues with Share methods but testing with Unity 2019 ( the minimum Unity Engine supported since version 14.1.0 ) this  issue is not happening anymore.

Reviewed By: SergioGuerreroFB

Differential Revision: D45940165

fbshipit-source-id: fecc3b1c5910ec74aa757a6e118435d843b1b86d

facebook-android-wrapper/src/com/facebook/unity/BaseActivity.java

@@ -35,14 +35,6 @@ public abstract class BaseActivity extends Activity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mCallbackManager = CallbackManager.Factory.create();
-
-        // During a share or other activity switch this activity may be destroyed.
-        // The UnityActivity will also get killed and the developers game will need to restart and
-        // the callback won't be registered. But to avoid throwing an exception initialize the sdk
-        // to allow the callback to complete.
-        if (!FacebookSdk.isInitialized()) {
-            FacebookSdk.sdkInitialize(getApplicationContext());
-        }
     }
 
     @Override

facebook-android-wrapper/src/com/facebook/unity/FB.java

@@ -123,6 +123,8 @@ public static void Init(final String params_str) {
         // (Deprecated) Attempt to initialize SDK manually with FB.Init args
         FacebookSdk.setClientToken(unity_params.getString("clientToken"));
         FacebookSdk.setApplicationId(appID);
+        FacebookSdk.setAutoInitEnabled(true);
+        FacebookSdk.fullyInitialize();
         FacebookSdk.sdkInitialize(FB.getUnityActivity(), new FacebookSdk.InitializeCallback() {
             @Override
             public void onInitialized() {