Create a collapsing toolbar based activity

On Android S, each of subsetting pages will have a collapsing toolbar to
enlarge its title. However, there are many different pages from
differennt apps. So we extracted a base activity with collapsing toolbar
layout so it is easier to enbale a collapsing toolbar in their own
pages.

Bug: 179380824
Test: visual verified
Change-Id: Ic505d65320081589d1e1b5eb4bd2af7a06e60d39
diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/AndroidManifest.xml b/packages/SettingsLib/CollapsingToolbarBaseActivity/AndroidManifest.xml
new file mode 100644
index 0000000..dabba68
--- /dev/null
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/AndroidManifest.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.android.settingslib.collapsingtoolbar">
+
+    <uses-sdk android:minSdkVersion="21" />
+
+</manifest>