drm_hwcomposer: Stop using HWC2 hooks for layer transform

Add a transform member to LayerProperties.

Change-Id: Id81386ce1565941e477534717cefb745de8738ca
Signed-off-by: Drew Davenport <ddavenport@google.com>
diff --git a/hwc2_device/HwcLayer.cpp b/hwc2_device/HwcLayer.cpp
index c972e0b..ded8acd 100644
--- a/hwc2_device/HwcLayer.cpp
+++ b/hwc2_device/HwcLayer.cpp
@@ -47,6 +47,9 @@
   if (layer_properties.source_crop) {
     layer_data_.pi.source_crop = layer_properties.source_crop.value();
   }
+  if (layer_properties.transform) {
+    layer_data_.pi.transform = layer_properties.transform.value();
+  }
 }
 
 // NOLINTNEXTLINE(readability-convert-member-functions-to-static)