Readd enableAccountHandling for show slider

Signed-off-by: Joris Bodin <joris.bodin@infomaniak.com>

src/main/java/com/nextcloud/client/onboarding/FirstRunActivity.java

@@ -72,6 +72,8 @@ public class FirstRunActivity extends BaseActivity implements ViewPager.OnPageCh
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
+        enableAccountHandling = false;
+
         super.onCreate(savedInstanceState);
         setContentView(R.layout.first_run_activity);
 

src/main/java/com/owncloud/android/ui/activity/BaseActivity.java

@@ -34,6 +34,7 @@ public abstract class BaseActivity extends AppCompatActivity implements Injectab
      */
     private boolean themeChangePending;
     private boolean paused;
+    protected boolean enableAccountHandling = true;
 
     private MixinRegistry mixinRegistry = new MixinRegistry();
     private SessionMixin sessionMixin;
@@ -59,7 +60,10 @@ public abstract class BaseActivity extends AppCompatActivity implements Injectab
                                         getContentResolver(),
                                         accountManager);
         mixinRegistry.add(sessionMixin);
-        mixinRegistry.onCreate(savedInstanceState);
+
+        if (enableAccountHandling) {
+            mixinRegistry.onCreate(savedInstanceState);
+        }
     }
 
     @Override