libmedia_datasource_headers: export libbinder_headers

Test: builds
Bug: 186266747
Change-Id: I8e044fe54403a0c49eeb0110b8533922614b5d2c
diff --git a/media/libmedia/Android.bp b/media/libmedia/Android.bp
index 48b5391..6214f5e 100644
--- a/media/libmedia/Android.bp
+++ b/media/libmedia/Android.bp
@@ -43,6 +43,12 @@
             enabled: false,
         },
     },
+    header_libs: [
+        "libbinder_headers",
+    ],
+    export_header_lib_headers: [
+        "libbinder_headers",
+    ],
     apex_available: [
         "//apex_available:platform",
         "com.android.media",