Change small area detection to support new front end design

This will still use legacy layer to calculate the small dirty, and
update the info to the LayerSnapshot.

Also fix some issues in setIsSmallDirty() for
1. Set mSmallDirty flag as false if the surface damage region is
   invalid.
2. Apply the scaling to the damage region before dirty area
   calculations.

Bug: 295062543
Bug: 303258910
Bug: 303609027
Test: atest LayerHistoryTest
Test: atest SmallAreaDetectionTest
Change-Id: Ib0e3737e63b5653422b5b5054b893578dc63f768