test-hwc2: set layer blend mode

Test: Add "#define HAVE_NO_SURFACE_FLINGER" to
          frameworks/native/libs/gui/BufferQueueCore.cpp.
      Recompile and flash.
      Run "mm" in frameworks/native/services/surfaceflinger/tests/hwc2.
      Push test-hwc2 to device.
      Run "adb root && adb shell stop".
      Run test case. Ex: "./test-hwc2"

Change-Id: Id5a7a568fb81ac9aff388d04077a12765cc135a3
diff --git a/services/surfaceflinger/tests/hwc2/Hwc2TestLayer.cpp b/services/surfaceflinger/tests/hwc2/Hwc2TestLayer.cpp
index 09fb921..2ea61b8 100644
--- a/services/surfaceflinger/tests/hwc2/Hwc2TestLayer.cpp
+++ b/services/surfaceflinger/tests/hwc2/Hwc2TestLayer.cpp
@@ -19,21 +19,32 @@
 #include "Hwc2TestLayer.h"
 
 Hwc2TestLayer::Hwc2TestLayer(Hwc2TestCoverage coverage)
-    : mComposition(coverage) { }
+    : mBlendMode(coverage),
+      mComposition(coverage) { }
 
 std::string Hwc2TestLayer::dump() const
 {
     std::stringstream dmp;
 
     dmp << "layer: \n";
-    dmp << mComposition.dump();
+
+    for (auto property : mProperties) {
+        dmp << property->dump();
+    }
 
     return dmp.str();
 }
 
 void Hwc2TestLayer::reset()
 {
-    mComposition.reset();
+    for (auto property : mProperties) {
+        property->reset();
+    }
+}
+
+hwc2_blend_mode_t Hwc2TestLayer::getBlendMode() const
+{
+    return mBlendMode.get();
 }
 
 hwc2_composition_t Hwc2TestLayer::getComposition() const
@@ -41,6 +52,11 @@
     return mComposition.get();
 }
 
+bool Hwc2TestLayer::advanceBlendMode()
+{
+    return mBlendMode.advance();
+}
+
 bool Hwc2TestLayer::advanceComposition()
 {
     return mComposition.advance();