Use vectors instead of pngs! (#459)

Author: SUPERCILEX

app/src/main/java/com/firebase/uidemo/auth/AuthUiActivity.java

@@ -280,6 +280,10 @@ private List<IdpConfig> getSelectedProviders() {
             selectedProviders.add(new IdpConfig.Builder(AuthUI.EMAIL_PROVIDER).build());
         }
 
+        if (mUseTwitterProvider.isChecked()) {
+            selectedProviders.add(new IdpConfig.Builder(AuthUI.TWITTER_PROVIDER).build());
+        }
+
         if (mUseFacebookProvider.isChecked()) {
             selectedProviders.add(
                     new IdpConfig.Builder(AuthUI.FACEBOOK_PROVIDER)
@@ -294,10 +298,6 @@ private List<IdpConfig> getSelectedProviders() {
                             .build());
         }
 
-        if (mUseTwitterProvider.isChecked()) {
-            selectedProviders.add(new IdpConfig.Builder(AuthUI.TWITTER_PROVIDER).build());
-        }
-
         return selectedProviders;
     }