HWC2: Set composition type before setting buffer

SurfaceFlinger was incorrectly setting the buffer handle before
setting the composition type. This led to cases where the layer was
initially marked as Invalid or Client, allowing HWC2 to ignore the
buffer handle, even though the layer was later changed to Device
before presentation.

Bug: 28814745
Change-Id: I41189495dcb254f04e6b2b329c044301c5cff97c