[MD] Return list of scored refresh rates based on overallscore.

The sorted list returns the refresh rates in the
descending order of priority and their
overallscore.

This overall score will be used and called for multiple displays
and will be used to make the final selection in the
DisplayModeController for all the displays.

BUG: 240743471
Test: atest libsurfaceflinger_unittest
Change-Id: I8355425e89452f5ce73858a6173c53be9f3753ef