Add libbinder_ndk to the NDK.

This library is a C API over libbinder. Its intended to be used as a
bakend of AIDL, but implemented services direclty in this protocol is
also possible.

Bug: 111445392
Test: runtests.sh
Change-Id: Iaf3adc0dce0646dcc04e78ae33cccdf0c29d613c
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index 459b6b5..3f3c4fa 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -37,3 +37,19 @@
         "libutils",
     ],
 }
+
+ndk_headers {
+    name: "libbinder_ndk_headers",
+    from: "include_ndk/android",
+    to: "android",
+    srcs: [
+        "include_ndk/android/*.h",
+    ],
+    license: "NOTICE",
+}
+
+ndk_library {
+    name: "libbinder_ndk",
+    symbol_file: "libbinder_ndk.map.txt",
+    first_version: "29",
+}