Drop SDK with support libraries from LRW15C  #1280654

Also added script import_currrent_sdk.sh to help update the prerelease
SDK.

Change-Id: I67c709fd02869b73581d6cfa5a9a0e4293ea2890
diff --git a/current/support/v7/appcompat/res/values-v21/themes_base.xml b/current/support/v7/appcompat/res/values-v21/themes_base.xml
new file mode 100644
index 0000000..6155225
--- /dev/null
+++ b/current/support/v7/appcompat/res/values-v21/themes_base.xml
@@ -0,0 +1,45 @@
+<?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>
+
+    <!--
+        Theme in the "Theme.Platform.AppCompat" family are designed to be aliases for the default
+        theme on a given platform version. They should not set any styleable attributes. Instead
+        you should create a "Theme.Base" theme which inherits from a "Theme.Platform" theme.
+    -->
+    <eat-comment/>
+    <style name="Theme.Platform.AppCompat" parent="android:Theme.Material" />
+
+    <style name="Theme.Platform.AppCompat.Light" parent="android:Theme.Material.Light" />
+
+    <style name="Theme.Platform.AppCompat.Light.DarkActionBar"
+           parent="android:Theme.Material.Light.DarkActionBar" />
+
+    <style name="Theme.Platform.AppCompat.DialogWhenLarge"
+           parent="android:Theme.Material.DialogWhenLarge" />
+
+    <style name="Theme.Platform.AppCompat.Light.DialogWhenLarge"
+           parent="android:Theme.Material.Light.DialogWhenLarge" />
+
+    <style name="Theme.Platform.AppCompat.Dialog"
+           parent="android:Theme.Material.Dialog" />
+
+    <style name="Theme.Platform.AppCompat.Light.Dialog"
+           parent="android:Theme.Material.Light.Dialog" />
+
+</resources>