CustomChoiceList: Increment min-sdk to 4

Resolves build error:
    Manifest merger failed : uses-sdk:minSdkVersion 3 cannot be
    smaller than version 4 declared in library
    com.android.support:support-v4:21.0.0

Change-Id: Id1195405276e993200e8a326ef63b15c8261bb6d
diff --git a/ui/lists/CustomChoiceList/template-params.xml b/ui/lists/CustomChoiceList/template-params.xml
index b58c0ac..407aa0b 100644
--- a/ui/lists/CustomChoiceList/template-params.xml
+++ b/ui/lists/CustomChoiceList/template-params.xml
@@ -20,7 +20,7 @@
     <package>com.example.android.customchoicelist</package>
 
     <!-- change minSdk if needed-->
-    <minSdk>3</minSdk>
+    <minSdk>4</minSdk>
 
     <strings>
         <intro>