Replace libnativeloader-dummy-headers with libnativeloader-headers

The libnativeloader-dummy-headers target has been deprecated in favour
of the more appropriately named by otherwise identical
libnativeloader-headers

Test: m checkbuild
Change-Id: I0d4018734f91a7da68d4c730f3c5bfb65c163ab8
diff --git a/libs/graphicsenv/Android.bp b/libs/graphicsenv/Android.bp
index f11cf62..642c5f2 100644
--- a/libs/graphicsenv/Android.bp
+++ b/libs/graphicsenv/Android.bp
@@ -33,7 +33,7 @@
     ],
 
     header_libs: [
-        "libnativeloader-dummy-headers",
+        "libnativeloader-headers",
     ],
 
     export_include_dirs: ["include"],