Link with actual headers instead of symlinks

and remove the symlinks.

Bug: 143245419
Test: build
Change-Id: I70e450d9db0f65048f86391c4d3f341659cd213f
diff --git a/drm/libmediadrm/Android.bp b/drm/libmediadrm/Android.bp
index 6b1b475..255640f 100644
--- a/drm/libmediadrm/Android.bp
+++ b/drm/libmediadrm/Android.bp
@@ -165,4 +165,8 @@
         "libmediadrmmetrics_full",
         "libutils",
     ],
+
+    header_libs: [
+        "libstagefright_foundation_headers",
+    ],
 }