Allow using libandroid_headers_private on host builds

This is needed to create a host implementation of RenderThread.

Bug: 322360037
Test: build libandroid_runtime on host
Change-Id: I23f78155e0d2c511451e3e249537b83ca06f411a

Author: jgaillard85

Android.bp

@@ -105,7 +105,13 @@ aidl_library {
 
 cc_library_headers {
     name: "libandroid_headers_private",
+    host_supported: true,
     export_include_dirs: ["include/private"],
+    target: {
+        windows: {
+            enabled: true,
+        },
+    },
 }
 
 filegroup {

include/android/choreographer.h

@@ -48,9 +48,19 @@
 #ifndef ANDROID_CHOREOGRAPHER_H
 #define ANDROID_CHOREOGRAPHER_H
 
+#include <stddef.h>
 #include <stdint.h>
 #include <sys/cdefs.h>
 
+// This file may also be built on glibc or on Windows/MacOS libc's, so no-op
+// and deprecated definitions are provided.
+#if !defined(__INTRODUCED_IN)
+#define __INTRODUCED_IN(__api_level) /* nothing */
+#endif
+#if !defined(__DEPRECATED_IN)
+#define __DEPRECATED_IN(__api_level) __attribute__((__deprecated__))
+#endif
+
 __BEGIN_DECLS
 
 struct AChoreographer;