Added QR code scanner as tunnel import method

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
     package="com.wireguard.android"
     android:installLocation="internalOnly">
 
+    <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
@@ -50,6 +51,11 @@
             android:label="@string/create_activity_title"
             android:parentActivityName=".activity.MainActivity" />
 
+        <activity
+            android:name="com.journeyapps.barcodescanner.CaptureActivity"
+            android:screenOrientation="fullSensor"
+            tools:replace="screenOrientation" />
+
         <receiver android:name=".BootShutdownReceiver">
             <intent-filter>
                 <action android:name="android.intent.action.ACTION_SHUTDOWN" />