Update minSdkVersion on sample so shared runtime works

Author: Redth

v7-gridlayout/samples/AndroidSupportSample/Properties/AndroidManifest.xml

@@ -1,8 +1,7 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.xamarin.supportv7gridlayout.sample">
-	<uses-sdk android:minSdkVersion="7"  />
+	<uses-sdk android:minSdkVersion="10" />
 	<supports-screens android:requiresSmallestWidthDp="320" android:compatibleWidthLimitDp="480" />
-	<application android:label="@string/activity_sample_code" android:icon="@drawable/app_sample_code" android:hardwareAccelerated="true">
-	</application>
+	<application android:label="@string/activity_sample_code" android:icon="@drawable/app_sample_code" android:hardwareAccelerated="true"></application>
 	<uses-permission android:name="android.permission.INTERNET" />
 </manifest>