Workaround Spinner.Underlined not working in RTL on v21-22

We now continue using the compat style and assets in ldrtl
on v21 and v22.

BUG: 22960151
Change-Id: I19168957db3d5292ad286098c22c6a1dd45b02db
diff --git a/v7/appcompat/res/values-ldltr-v21/styles_base.xml b/v7/appcompat/res/values-ldltr-v21/styles_base.xml
new file mode 100644
index 0000000..57ebdba
--- /dev/null
+++ b/v7/appcompat/res/values-ldltr-v21/styles_base.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2015 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.
+-->
+
+<resources>
+
+    <!-- Like in themes_base.xml, the namespace "*.AppCompat.Base" is used to
+     define base styles for the platform version. The "*.AppCompat"
+     variants are for direct use or use as parent styles by the app. -->
+    <eat-comment/>
+
+    <!-- The platform Underlined style only works in LTR in v21-22 -->
+    <style name="Base.Widget.AppCompat.Spinner.Underlined" parent="android:Widget.Material.Spinner.Underlined" />
+
+</resources>
diff --git a/v7/appcompat/res/values-ldrtl-v23/styles_base.xml b/v7/appcompat/res/values-ldrtl-v23/styles_base.xml
new file mode 100644
index 0000000..cba56bd
--- /dev/null
+++ b/v7/appcompat/res/values-ldrtl-v23/styles_base.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2014 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.
+-->
+
+<resources>
+
+    <style name="Base.Widget.AppCompat.Spinner.Underlined" parent="android:Widget.Material.Spinner.Underlined" />
+
+</resources>
diff --git a/v7/appcompat/res/values-v21/styles_base.xml b/v7/appcompat/res/values-v21/styles_base.xml
index 649f0ca..f0c783e 100644
--- a/v7/appcompat/res/values-v21/styles_base.xml
+++ b/v7/appcompat/res/values-v21/styles_base.xml
@@ -113,7 +113,7 @@
 
     <style name="Base.Widget.AppCompat.Spinner" parent="android:Widget.Material.Spinner" />
 
-    <style name="Base.Widget.AppCompat.Spinner.Underlined" parent="android:Widget.Material.Spinner.Underlined" />
+    <!-- Base.Widget.AppCompat.Spinner.Underlined is overridden in ldltr-v21 and v23 -->
 
     <style name="Base.Widget.AppCompat.ListView" parent="android:Widget.Material.ListView" />
     <style name="Base.Widget.AppCompat.ListView.Menu" />