Disable manual storage scanning

Closes https://github.com/FossifyOrg/File-Manager/issues/28

When there are more than a few files on the SD Card, this can lead to a busy media scanner situation where any further calls to scan a file are scheduled to be executed after the initial scan is complete. As a result, simple actions like rename (which trigger a rescan) can take a long time to complete.

Originally added in 4cca280de7 to fix issues related to stale SD Card stats but it doesn't seem necessary as per my testing.

app/src/main/kotlin/org/fossify/filemanager/fragments/StorageFragment.kt

@@ -6,7 +6,6 @@ import android.app.usage.StorageStatsManager
 import android.content.ContentResolver
 import android.content.Context
 import android.content.Intent
-import android.media.MediaScannerConnection
 import android.os.Handler
 import android.os.Looper
 import android.os.storage.StorageManager
@@ -33,7 +32,6 @@ import org.fossify.filemanager.extensions.getAllVolumeNames
 import org.fossify.filemanager.helpers.*
 import org.fossify.filemanager.interfaces.ItemOperationsListener
 import org.fossify.filemanager.models.ListItem
-import java.io.File
 import java.util.Locale
 
 class StorageFragment(context: Context, attributeSet: AttributeSet) : MyViewPagerFragment<MyViewPagerFragment.StorageInnerBinding>(context, attributeSet),
@@ -299,11 +297,6 @@ class StorageFragment(context: Context, attributeSet: AttributeSet) : MyViewPage
                 volumeName = storageVolume.uuid!!.lowercase(Locale.US)
                 totalStorageSpace = file.totalSpace
                 freeStorageSpace = file.freeSpace
-                post {
-                    ensureBackgroundThread {
-                        scanVolume(volumeName, file)
-                    }
-                }
             }
 
             post {
@@ -326,22 +319,6 @@ class StorageFragment(context: Context, attributeSet: AttributeSet) : MyViewPage
         }
     }
 
-    private fun scanVolume(volumeName: String, root: File) {
-        val paths = mutableListOf<String>()
-        if (context.isPathOnSD(root.path)) {
-            File(context.sdCardPath).walkBottomUp().forEach {
-                paths.add(it.path)
-            }
-        }
-        var callbackCount = 0
-        MediaScannerConnection.scanFile(context, paths.toTypedArray(), null) { _, _ ->
-            callbackCount++
-            if (callbackCount == paths.size) {
-                getSizes(volumeName)
-            }
-        }
-    }
-
     override fun searchQueryChanged(text: String) {
         lastSearchedText = text
         binding.apply {