Contacts: style fast scroll thumb like in Dialer

Change-Id: I1306e14fd6bc033019cbc8b563c1d4b6e6824731
diff --git a/res/drawable/thumb_default.xml b/res/drawable/thumb_default.xml
new file mode 100644
index 0000000..4ab2445
--- /dev/null
+++ b/res/drawable/thumb_default.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2017 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.
+  -->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       android:shape="rectangle">
+    <corners
+        android:topLeftRadius="8dp"
+        android:topRightRadius="8dp"
+        android:bottomLeftRadius="8dp"
+        android:bottomRightRadius="8dp"/>
+    <size android:height="48dp" android:width="8dp"/>
+    <solid android:color="@color/secondary_text_color" />
+</shape>