Add getDataSpace to layer class

Test: TBD
Change-Id: I1d583bc6dae4cfb1569f053b2480e94b6ca9cc6f
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 6b228b0..afe6074 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -261,6 +261,8 @@
     void forceClientComposition(int32_t hwcId);
     void setPerFrameData(const sp<const DisplayDevice>& displayDevice);
 
+    android_dataspace getDataSpace() const;
+
     // callIntoHwc exists so we can update our local state and call
     // acceptDisplayChanges without unnecessarily updating the device's state
     void setCompositionType(int32_t hwcId, HWC2::Composition type,