Propagate ANNMemory_free to IBurstContext::freeMemory -- VTS update

This CL adapts the VTS code to the corresponding changes made in the NN
utility library.

Bug: 128319484
Test: mma
Test: atest VtsHalNeuralnetworksV1_0Target
Test: atest VtsHalNeuralnetworksV1_1Target
Test: atest VtsHalNeuralnetworksV1_2Target
Change-Id: I470e8228cde2b75620ad851e4fe408f8e8329e7c
Merged-In: I470e8228cde2b75620ad851e4fe408f8e8329e7c
(cherry picked from commit 102e0442d89df080da69924b1cae8f04c9665a1a)
diff --git a/neuralnetworks/1.2/vts/functional/ValidateRequest.cpp b/neuralnetworks/1.2/vts/functional/ValidateRequest.cpp
index 09e26cc..870d017 100644
--- a/neuralnetworks/1.2/vts/functional/ValidateRequest.cpp
+++ b/neuralnetworks/1.2/vts/functional/ValidateRequest.cpp
@@ -155,7 +155,7 @@
         SCOPED_TRACE(message + " [burst]");
 
         // create burst
-        std::unique_ptr<::android::nn::ExecutionBurstController> burst =
+        std::shared_ptr<::android::nn::ExecutionBurstController> burst =
                 ::android::nn::ExecutionBurstController::create(preparedModel, /*blocking=*/true);
         ASSERT_NE(nullptr, burst.get());