Moved main Activity to ui sub-package

Also force portrait orientation.

src/frontends/android/AndroidManifest.xml

@@ -12,8 +12,10 @@
         android:icon="@drawable/strongswan"
         android:label="@string/app_name" >
         <activity
-            android:name=".strongSwanActivity"
+            android:name=".ui.MainActivity"
-            android:label="@string/app_name" >
+            android:label="@string/app_name"
+            android:launchMode="singleTop"
+            android:screenOrientation="portrait" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

src/frontends/android/src/org/strongswan/android/ui/MainActivity.java

@@ -1,11 +1,11 @@
-package org.strongswan.android;
+package org.strongswan.android.ui;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.net.VpnService;
 import android.os.Bundle;
 
-public class strongSwanActivity extends Activity
+public class MainActivity extends Activity
 {
 	@Override
 	public void onCreate(Bundle savedInstanceState)