Add the dependency on libbootloader_message.

<bootloader.h> has been exported by libbootloader_message as
<bootloader_message/bootloader_message.h>.

Also drop the header include for libupdate_engine_boot_control which
doesn't use the header.

Test: mmma -j system/update_engine
Test: update_engine_unittests
Change-Id: Iacfb5b2d651243222c7ad797a67a4285ef680ca1
diff --git a/hardware_android.cc b/hardware_android.cc
index 58c68b6..c0b87ce 100644
--- a/hardware_android.cc
+++ b/hardware_android.cc
@@ -23,11 +23,10 @@
 #include <algorithm>
 #include <memory>
 
-#include <bootloader.h>
-
 #include <android-base/properties.h>
 #include <base/files/file_util.h>
 #include <base/strings/stringprintf.h>
+#include <bootloader_message/bootloader_message.h>
 
 #include "update_engine/common/hardware.h"
 #include "update_engine/common/platform_constants.h"