Change RenderEngine::drawLayers to take a vector of LayerSettings pointers

Prework for the client composition cache logic which extends
LayerSettings. Passing in a set of pointers will reduce the
amount of copying needed when passing the LayerSettings to
RenderEngine.

Bug: 136561771
Test: atest librenderengine_test libcompositionengine_test
Test: atest VtsHalGraphicsComposerV2_2TargetTest
Test: go/wm-smoke

Change-Id: I0581be7762bf56cd7a3aab0511adf95cd6e2df76

graphics/composer/2.2/utils/vts/RenderEngineVts.cpp

@@ -57,7 +57,15 @@ void TestRenderEngine::initGraphicBuffer(uint32_t width, uint32_t height, uint32
 void TestRenderEngine::drawLayers() {
     base::unique_fd bufferFence;
     base::unique_fd readyFence;
-    mRenderEngine->drawLayers(mDisplaySettings, mCompositionLayers,
+
+    std::vector<const renderengine::LayerSettings*> compositionLayerPointers;
+    compositionLayerPointers.reserve(mCompositionLayers.size());
+    std::transform(mCompositionLayers.begin(), mCompositionLayers.end(),
+                   std::back_insert_iterator(compositionLayerPointers),
+                   [](renderengine::LayerSettings& settings) -> renderengine::LayerSettings* {
+                       return &settings;
+                   });
+    mRenderEngine->drawLayers(mDisplaySettings, compositionLayerPointers,
                               mGraphicBuffer->getNativeBuffer(), true, std::move(bufferFence),
                               &readyFence);
     int fd = readyFence.release();