Revert "Delete HWC1"

This reverts commit 90f923493fa053655a203c34ea491086aeb07602.

Change-Id: If9da49e3bc85f8ff21ac1bd22a6bab97e9aa3103
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.h b/services/surfaceflinger/DisplayHardware/HWComposer.h
index b25f5ad..41671f6 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.h
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.h
@@ -14,6 +14,10 @@
  * limitations under the License.
  */
 
+#ifndef USE_HWC2
+#include "HWComposer_hwc1.h"
+#else
+
 #ifndef ANDROID_SF_HWCOMPOSER_H
 #define ANDROID_SF_HWCOMPOSER_H
 
@@ -220,3 +224,5 @@
 }; // namespace android
 
 #endif // ANDROID_SF_HWCOMPOSER_H
+
+#endif // #ifdef USE_HWC2