SurfaceFlinger: insert RefreshRateOverlay layer in the correct place

Reinsert RefreshRateOverlay layer to layersSortedByZ when setting Z
to keep layersSortedByZ sorted.

Test: adb shell service call SurfaceFlinger 1034 i32 1 + screen rotate
Bug: 131211294
Change-Id: I40b8f33b6edda7fc8840e4db839c9c0665068c8c
2 files changed