enhancement : ability to select columns to be shown on folder item

[kaushik-naik]

Type of change(s)

• Bug fix
• Feature / enhancement
• Infrastructure / tooling (CI, build, deps, tests)
• Documentation

What changed and why

• Add new keys in Constants.kt (FOLDER_SHOW_SIZE, FOLDER_SHOW_LAST_MODIFIED_AT and FOLDER_SHOW_CHILDREN_COUNT) to store user preference (also added these fields in Config.kt).
• Conditionally render children count, folder size and last modified data for folder item.
• Add a new option in SettingsActivity to show a dialog to Manage Manage folder column
• Add new values in strings.xml related to the enhancement.
• Minor change in item_file_dir_list.xml view as the layout was not rendering properly when font size is set to extra large.

Tests performed

1. Impact of theme on:
   1. Dialog
   2. Preference checkbox
   3. folder details
2. Preferences
   1. saved on app restart
   2. saved on cache clear
   3. cleared on clear data
   4. default on fresh install

Before & after preview

1. Modified at position (Before,After)

2. Set preference dialog

3. Folder Listing View (Before,After)

Closes the following issue(s)

• Closes Ability to customize folder item details #321

Checklist

• I read the contribution guidelines.
• I manually tested my changes on device/emulator (if applicable).
• I updated the "Unreleased" section in CHANGELOG.md (if applicable).
• I have self-reviewed my pull request (no typos, formatting errors, etc.).
• I understand every change in this pull request.