SF: Move/Refactor prepareFrame to CompositionEngine

This refactors both the SurfaceFlinger::prepareFrame() and
HWComposer::prepare() logic, moving things to to
compositionEngine::Output and compositionEngine::Display.

Along the way, the composition related state is moved out of HWComposer
up to compositionengine::OutputCompositionState.

As there were some subtleties, tests are also added to cover the
refactored logic.

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683

Change-Id: I2713e9e52751ca0523f6348ffdb51ead8bca5235
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputCompositionState.cpp b/services/surfaceflinger/CompositionEngine/src/OutputCompositionState.cpp
index 0b15dad..3e47fe2 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputCompositionState.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputCompositionState.cpp
@@ -24,6 +24,10 @@
     dumpVal(out, "isEnabled", isEnabled);
     dumpVal(out, "isSecure", isSecure);
 
+    dumpVal(out, "usesClientComposition", usesClientComposition);
+    dumpVal(out, "usesDeviceComposition", usesDeviceComposition);
+    dumpVal(out, "flipClientTarget", flipClientTarget);
+
     dumpVal(out, "layerStack", layerStackId);
     dumpVal(out, "layerStackInternal", layerStackInternal);