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/states/OverviewState.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2017 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.states;
+
+import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_OVERVIEW;
+
+import android.content.Context;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
+import com.android.launcher3.R;
+import com.android.launcher3.util.Themes;
+
+/**
+ * Definition for overview state
+ */
+public class OverviewState extends LauncherState {
+
+    public OverviewState(int id) {
+        super(id, LAUNCHER_STATE_OVERVIEW, FLAG_DISABLE_RESTORE);
+    }
+
+    @Override
+    public int getTransitionDuration(Context context, boolean isToState) {
+        return 250;
+    }
+
+    public static OverviewState newBackgroundState(int id) {
+        return new OverviewState(id);
+    }
+
+    public static OverviewState newSwitchState(int id) {
+        return new OverviewState(id);
+    }
+
+    /**
+     *  New Overview substate that represents the overview in modal mode (one task shown on its own)
+     */
+    public static OverviewState newModalTaskState(int id) {
+        return new OverviewState(id);
+    }
+
+    /**
+     *  New Overview substate that represents the overview in modal mode (one task shown on its own)
+     */
+    public static OverviewState newSplitSelectState(int id) {
+        return new OverviewState(id);
+    }
+
+    @Override
+    public int getWorkspaceScrimColor(Launcher launcher) {
+        return Themes.getAttrColor(launcher, R.attr.overviewScrimColor);
+    }
+}