Revert "get rid of IGraphicBufferAlloc"

This reverts commit 1da94dfed674e94edc37cdc8ef68530520edf169.

Bug: 36176799
Bug: 36175706
Change-Id: I6dd5fe8df564f0efa4392a800fb316e27a05076e
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index be48c11..da6f13d 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -366,6 +366,9 @@
             const sp<IGraphicBufferProducer>& /* parent */) override {
         return nullptr;
     }
+    sp<IGraphicBufferAlloc> createGraphicBufferAlloc() override {
+        return nullptr;
+    }
     sp<IDisplayEventConnection> createDisplayEventConnection() override {
         return nullptr;
     }