Add licenses to ndk_headers.

Test: make ndk
Bug: None
Change-Id: Ia113ea42b1d62d87dfbb2fc456428c7db50a98f1
diff --git a/vulkan/Android.bp b/vulkan/Android.bp
index 97d99d0..d97cf5e 100644
--- a/vulkan/Android.bp
+++ b/vulkan/Android.bp
@@ -17,6 +17,7 @@
     from: "include",
     to: "",
     srcs: ["include/vulkan/**/*.h"],
+    license: "include/vulkan/NOTICE",
 }
 
 subdirs = [