Remove duplicate head_libs.

Test: build & boot
Change-Id: I26501d5b0fafc8a12db2a0c26f13c470839f9c4d
Signed-off-by: guochuang <guochuang@xiaomi.corp-partner.google.com>
diff --git a/media/ndk/Android.bp b/media/ndk/Android.bp
index 9ec7700..3d873df 100644
--- a/media/ndk/Android.bp
+++ b/media/ndk/Android.bp
@@ -192,7 +192,6 @@
     header_libs: [
         "libstagefright_headers",
         "libmedia_headers",
-        "libstagefright_headers",
     ],
 
     shared_libs: [