firmware: add write method

The write() method is how the different firmware handlers will receive
data from the update process.

Change-Id: I550a25f69272bae917309956fef798bc3d4eed2e
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/static_handler.cpp b/static_handler.cpp
index 1d7e8e9..8cb20e0 100644
--- a/static_handler.cpp
+++ b/static_handler.cpp
@@ -1,7 +1,9 @@
 #include "static_handler.hpp"
 
+#include <cstdint>
 #include <memory>
 #include <string>
+#include <vector>
 
 namespace blobs
 {
@@ -12,4 +14,10 @@
     return false;
 }
 
+bool StaticLayoutHandler::write(std::uint32_t offset,
+                                const std::vector<std::uint8_t>& data)
+{
+    return false;
+}
+
 } // namespace blobs