Add file bundles.

Start work on ftp support.

app/src/main/AndroidManifest.xml

@@ -6,6 +6,9 @@
         android:name="android.hardware.camera"
         android:required="true" />
 
+
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
     <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
@@ -36,10 +39,14 @@
             android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
+                <action android:name="android.intent.action.GET_CONTENT" />
+                <category android:name="android.intent.category.OPEN_FILE" />
+                <data android:mimeType="*/*" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ui.transfer.FileBundle$FileDialogActivity" />
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.fileprovider"