Refactor onCreate method: extract initLayout method

This commit refactors the onCreate() method by exctracting a new method to handle the layout inflation and setting of the content view. The readability of onCreate method is improved.

This change does not affect the functionality of the original code.

app/src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -251,12 +251,10 @@ public class FileDisplayActivity extends FileActivity
 
         super.onCreate(savedInstanceState);
         loadSavedInstanceState(savedInstanceState);
+
         /// USER INTERFACE
-
-        // Inflate and set the layout view
-        binding = FilesBinding.inflate(getLayoutInflater());
-        setContentView(binding.getRoot());
-
+        initLayout();
+        
         // setup toolbar
         setupHomeSearchToolbarWithSortAndListButtons();
 
@@ -303,6 +301,12 @@ public class FileDisplayActivity extends FileActivity
         }
     }
 
+    private void initLayout() {
+        // Inflate and set the layout view
+        binding = FilesBinding.inflate(getLayoutInflater());
+        setContentView(binding.getRoot());
+    }
+
     private void checkStoragePath() {
         String newStorage = Environment.getExternalStorageDirectory().getAbsolutePath();
         String storagePath = preferences.getStoragePath(newStorage);