Fix[file_provider]: check for storage before initializing

Author: artdeell

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/scoped/FolderProvider.java

@@ -47,7 +47,7 @@ public class FolderProvider extends DocumentsProvider {
 
     private static final String ALL_MIME_TYPES = "*/*";
 
-    private static final File BASE_DIR = new File(Tools.DIR_GAME_HOME);
+    private File BASE_DIR;
 
     private ContentResolver mContentResolver;
 
@@ -138,6 +138,12 @@ public AssetFileDescriptor openDocumentThumbnail(String documentId, Point sizeHi
 
     @Override
     public boolean onCreate() {
+        if(Tools.checkStorageRoot(getContext())) {
+            Tools.initStorageConstants(getContext());
+        }else {
+            return false;
+        }
+        BASE_DIR = new File(Tools.DIR_GAME_HOME);
         mContentResolver = getContext().getContentResolver();
         mStorageProviderAuthortiy = getContext().getString(R.string.storageProviderAuthorities);
         return true;