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/update.sh b/libs/binder/ndk/update.sh
index 1eba892..49b4730 100755
--- a/libs/binder/ndk/update.sh
+++ b/libs/binder/ndk/update.sh
@@ -18,5 +18,6 @@
 set -ex
 
 # This script makes sure that the source code is in sync with the various scripts
+./scripts/init_map.sh > libbinder_ndk.map.txt
 ./scripts/gen_parcel_helper.py
 ./scripts/format.sh