Create libcodec2_headers

Also, move libcodec2 to media/codec2/core.

Test: Builds

Bug: 112362730
Bug: 119853704
Change-Id: Ie2d03724a052ff55d607aa04417280682e51ae69
diff --git a/media/codec2/vndk/Android.bp b/media/codec2/vndk/Android.bp
index 5a7c98c..0eb90be 100644
--- a/media/codec2/vndk/Android.bp
+++ b/media/codec2/vndk/Android.bp
@@ -42,9 +42,9 @@
         "internal",
     ],
 
-    include_dirs: [
-        "frameworks/native/include/media/hardware",
-        "frameworks/av/media/codec2/include",
+    header_libs: [
+        "media_plugin_headers",
+        "libcodec2_headers",
     ],
 
     shared_libs: [