Code refactoring, PR changes.

app/src/main/java/org/schabi/newpipe/CheckForNewAppVersionTask.java

@@ -70,7 +70,6 @@ public class CheckForNewAppVersionTask extends AsyncTask<Void, Void, String> {
     protected String doInBackground(Void... voids) {
 
         // Make a network request to get latest NewPipe data.
-
         if (client == null) {
 
             client = new OkHttpClient
@@ -84,10 +83,8 @@ public class CheckForNewAppVersionTask extends AsyncTask<Void, Void, String> {
                 .build();
 
         try {
-
             Response response = client.newCall(request).execute();
             return response.body().string();
-
         } catch (IOException ex) {
             ErrorActivity.reportError(app, ex, null, null,
                     ErrorActivity.ErrorInfo.make(UserAction.SOMETHING_ELSE, "none",

app/src/main/java/org/schabi/newpipe/settings/UpdateSettingsFragment.java

@@ -23,14 +23,11 @@ public class UpdateSettingsFragment extends BasePreferenceFragment {
     }
 
     private Preference.OnPreferenceChangeListener updatePreferenceChange
-            = new Preference.OnPreferenceChangeListener() {
-        @Override
-        public boolean onPreferenceChange(Preference preference, Object newValue) {
+            = (preference, newValue) ->  {
 
-            defaultPreferences.edit().putBoolean(getString(R.string.update_app_key),
-                    (boolean) newValue).apply();
+        defaultPreferences.edit().putBoolean(getString(R.string.update_app_key),
+                (boolean) newValue).apply();
 
-            return true;
-        }
+        return true;
     };
 }