Chaniging all-apps scrim

> Converting the scrim to View, to better avoid overdraw
> Overview and Spring loaded state have different scrim alpha
> When going from overview to all-apps, there is a color scrim drawn over the overview panel.
  The slef color is merged with this color to prevent overdraw, and the remaining screen is drawn
  with a cut-out round rect path

Bug: 79111591
Change-Id: I26801fde13dd6adb4b06110bbe8087e35cc31847
diff --git a/res/layout/launcher.xml b/res/layout/launcher.xml
index 6556adf..cd8a425 100644
--- a/res/layout/launcher.xml
+++ b/res/layout/launcher.xml
@@ -57,6 +57,9 @@
             android:id="@+id/drop_target_bar"
             layout="@layout/drop_target_bar" />
 
+        <include android:id="@+id/scrim_view"
+            layout="@layout/scrim_view" />
+
         <include
             android:id="@+id/apps_view"
             layout="@layout/all_apps"
diff --git a/res/layout/scrim_view.xml b/res/layout/scrim_view.xml
new file mode 100644
index 0000000..a604d56
--- /dev/null
+++ b/res/layout/scrim_view.xml
@@ -0,0 +1,20 @@
+<?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