Some cleanup in RecentsView

> Merging overview and all-apps scrims into a single View
> Decoupling TaskMenuView from taskView

Bug: 184676497
Test: Manual

Change-Id: I49f7249eaa2a800054385ab8e73a441d6a1b5e16
diff --git a/res/layout/launcher.xml b/res/layout/launcher.xml
index 8451b77..f34e685 100644
--- a/res/layout/launcher.xml
+++ b/res/layout/launcher.xml
@@ -62,9 +62,12 @@
             android:id="@+id/drop_target_bar"
             layout="@layout/drop_target_bar" />
 
-        <include
+        <com.android.launcher3.views.ScrimView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
             android:id="@+id/scrim_view"
-            layout="@layout/scrim_view" />
+            android:background="?attr/allAppsScrimColor"
+            android:alpha="0" />
 
         <include
             android:id="@+id/apps_view"
diff --git a/res/layout/scrim_view.xml b/res/layout/scrim_view.xml
deleted file mode 100644
index a604d56..0000000
--- a/res/layout/scrim_view.xml
+++ /dev/null
@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- 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.
--->
-<com.android.launcher3.views.ScrimView
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:id="@+id/scrim_view" />
\ No newline at end of file