SF: Move/Refactor Layer::setGeometry() to compositionengine::OutputLayer

The front-end Layer now implements only a small bit of functionality
to compute the geometry state of the layer, traversing the parent
hierarchy as needed. The geometry is written to data added to
LayerFECompositionState.

compositionengine::OutputLayer then computes the actual state for the output
the layer is on, storing the result in OutputLayerCompositionState. A
second new function then takes the output-specific layer state (and
output-independent layer state) and sends it to the HWC layer.

Implements partial tests for the new functions.

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: Idc770e6c84d046555cc11d75d53fa22c4be4ae58