Handle DISPLAY_DECORATION

I90543850d57323be485a0fa8562f4e965aed28ab in hardware/interfaces
introduces the new Composition type, DISPLAY_DECORATION. Handle this
case when looking at Composition.

Bug: 193170859
Test: TODO
Change-Id: Ic5d5881dbbbaa348bf5ba39c5f8a4fca7b7170b4
diff --git a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
index e6bcec8..94ad6c3 100644
--- a/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/OutputLayer.cpp
@@ -539,6 +539,7 @@
             break;
         case Composition::CURSOR:
         case Composition::DEVICE:
+        case Composition::DISPLAY_DECORATION:
             writeBufferStateToHWC(hwcLayer, outputIndependentState, skipLayer);
             break;
         case Composition::INVALID:
@@ -684,6 +685,7 @@
 
         case Composition::DEVICE:
         case Composition::SOLID_COLOR:
+        case Composition::DISPLAY_DECORATION:
             result = (to == Composition::CLIENT);
             break;