Cleaning up some build configurations

> Removing Launcher3Go-without-quickstep
> Removing src_ui_overrides to src_no_quickstep
> Removing unnecessary code swpa for GO builds

Bug: 330920490
Flag: None
Test: Presubmit, everything builds
Change-Id: I5746dbc7c5a37c1d99d78b55bf2a6adce1a711c9

src_no_quickstep/com/android/launcher3/uioverrides/plugins/PluginManagerWrapper.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.android.launcher3.uioverrides.plugins;
+
+import android.content.ComponentName;
+import android.content.Context;
+
+import com.android.launcher3.util.MainThreadInitializedObject;
+import com.android.systemui.plugins.Plugin;
+import com.android.systemui.plugins.PluginListener;
+
+import java.util.Collections;
+import java.util.Set;
+
+import androidx.preference.PreferenceDataStore;
+
+public class PluginManagerWrapper {
+
+    public static final MainThreadInitializedObject<PluginManagerWrapper> INSTANCE =
+            new MainThreadInitializedObject<>(PluginManagerWrapper::new);
+
+    private static final String PREFIX_PLUGIN_ENABLED = "PLUGIN_ENABLED_";
+    public static final String PLUGIN_CHANGED = "com.android.systemui.action.PLUGIN_CHANGED";
+
+    private PluginManagerWrapper(Context c) {
+    }
+
+    public void addPluginListener(PluginListener<? extends Plugin> listener, Class<?> pluginClass) {
+    }
+
+    public void addPluginListener(PluginListener<? extends Plugin> listener, Class<?> pluginClass,
+            boolean allowMultiple) {
+    }
+
+    public void removePluginListener(PluginListener<? extends Plugin> listener) { }
+
+    public Set<String> getPluginActions() {
+        return Collections.emptySet();
+    }
+
+    public PreferenceDataStore getPluginEnabler() {
+        return new PreferenceDataStore() { };
+    }
+
+    public static String pluginEnabledKey(ComponentName cn) {
+        return PREFIX_PLUGIN_ENABLED + cn.flattenToString();
+    }
+
+    public static boolean hasPlugins(Context context) {
+        return false;
+    }
+}