Remove libcurl support from update_engine_sideload.

While sideloading an update from recovery we don't need nor want to
download payload from HTTP(S) URLs, only local file:// are supported.
This patch moves libcurl_http_fetcher and certificate_checker files out
of libpayload_consumer dropping the libcurl and libssl dependencies from
it and the update_engine_sideload.

Bug: 27178350
TEST=build UE for Brillo and Android. Unittests still pass and
update_engine_sideload doesn't link to libcurl.

Change-Id: Iffefdb094654f7277dc825c041fe55aac9ee8756
diff --git a/daemon_state_android.h b/daemon_state_android.h
index fc8be19..928a14e 100644
--- a/daemon_state_android.h
+++ b/daemon_state_android.h
@@ -20,8 +20,8 @@
 #include <memory>
 #include <set>
 
+#include "update_engine/certificate_checker.h"
 #include "update_engine/common/boot_control_interface.h"
-#include "update_engine/common/certificate_checker.h"
 #include "update_engine/common/hardware_interface.h"
 #include "update_engine/common/prefs_interface.h"
 #include "update_engine/daemon_state_interface.h"