Add functions to allocate/free raw aligned buffers

Change-Id: Ia42d562657154f85fa8062585a676f40746f6624
diff --git a/system/vulkan_enc/VkEncoder.cpp b/system/vulkan_enc/VkEncoder.cpp
index 9520fd6..360d0ee 100644
--- a/system/vulkan_enc/VkEncoder.cpp
+++ b/system/vulkan_enc/VkEncoder.cpp
@@ -28,6 +28,8 @@
 #include "IOStream.h"
 #include "VulkanStream.h"
 
+#include "android/base/AlignedBuf.h"
+
 #include "goldfish_vk_marshaling_guest.h"
 
 
@@ -38,6 +40,9 @@
 using goldfish_vk::VulkanCountingStream;
 using goldfish_vk::VulkanStream;
 
+using android::aligned_buf_alloc;
+using android::aligned_buf_free;
+
 class VkEncoder::Impl {
 public:
     Impl(IOStream* stream) : m_stream(stream) { }