Restore the libsync __ANDROID_API__ guard
Partially reverts 2a358106b7e554396088506e8e817520e2882aee
Bug: http://b/111668906
Test: m
Change-Id: Ic35091e10edda12a97992fbeffefda7ddf1305a1
diff --git a/libsync/include/ndk/sync.h b/libsync/include/ndk/sync.h
index 49f01e1..ba7d8c4 100644
--- a/libsync/include/ndk/sync.h
+++ b/libsync/include/ndk/sync.h
@@ -27,11 +27,14 @@
#define ANDROID_SYNC_H
#include <stdint.h>
+#include <sys/cdefs.h>
#include <linux/sync_file.h>
__BEGIN_DECLS
+#if __ANDROID_API__ >= 26
+
/* Fences indicate the status of an asynchronous task. They are initially
* in unsignaled state (0), and make a one-time transition to either signaled
* (1) or error (< 0) state. A sync file is a collection of one or more fences;
@@ -88,6 +91,8 @@
/** Free a struct sync_file_info structure */
void sync_file_info_free(struct sync_file_info* info) __INTRODUCED_IN(26);
+#endif /* __ANDROID_API__ >= 26 */
+
__END_DECLS
#endif /* ANDROID_SYNC_H */