Fix Recents not updating correctly on the cover screen

[MechaYutori]

This PR fixes two issues:

1. Apps launched from the cover screen do not appear in Recents on the cover screen until Recents is opened on the inner screen.
2. Recommended apps in Recents on the inner screen do not appear immediately after opening Recents on the cover screen.

Root cause:

• The first issue appears to be caused by Recents being brought to the foreground in an unintended way instead of being recreated, preventing the app list from being refreshed.
• The second issue was caused by multiple Recents instances existing simultaneously.

Changes:

• Replaced FLAG_ACTIVITY_REORDER_TO_FRONT with FLAG_ACTIVITY_CLEAR_TASK to recreate Recents and refresh the app list correctly.
• Added FLAG_ACTIVITY_NO_HISTORY to prevent the cover-screen Recents activity from remaining in the back stack.

Tested on:

• Galaxy Z Flip7
• One UI 8.5