Run libsu commands inside the global mount namespace

This ensures we're able to access other app's internal storage directories using libsu when running on Android 11 or newer.

Author: alexbakker

app/src/main/java/com/beemdevelopment/aegis/AegisApplication.java

@@ -29,6 +29,7 @@
 import com.beemdevelopment.aegis.vault.VaultManagerException;
 import com.mikepenz.iconics.Iconics;
 import com.mikepenz.material_design_iconic_typeface_library.MaterialDesignIconic;
+import com.topjohnwu.superuser.Shell;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -43,6 +44,11 @@ public class AegisApplication extends Application {
     private static final String CODE_LOCK_STATUS_ID = "lock_status_channel";
     private static final String CODE_LOCK_VAULT_ACTION = "lock_vault";
 
+    static {
+        // to access other app's internal storage directory, run libsu commands inside the global mount namespace
+        Shell.Config.setFlags(Shell.FLAG_MOUNT_MASTER);
+    }
+
     @Override
     public void onCreate() {
         super.onCreate();