Add AParcel_getAllowFds()

Currently platform-only until things stabilize

Bug: 145227478
Test: builds

Change-Id: I86ed825c33d1d8d63ee9450a0f6f9ea90d9772cf
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 7e72f22..a9eba47 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -114,3 +114,8 @@
   local:
     *;
 };
+
+LIBBINDER_NDK_PLATFORM {
+  global:
+    AParcel_getAllowFds;
+};