Use version script for heapprofd client API.

This gets rid of some unnecessary symbols in the ELF, see
https://gist.github.com/fmayer/710baea398f014a229629eea25cd5b64

Test: perfetto_integrationtests

Bug: 160400319
Change-Id: I5b161aa9739c4b85f26b2f8e9ccfd7aad2633b2e
diff --git a/Android.bp b/Android.bp
index be1e483..efbc521 100644
--- a/Android.bp
+++ b/Android.bp
@@ -282,6 +282,7 @@
   header_libs: [
     "bionic_libc_platform_headers",
   ],
+  version_script: "src/profiling/memory/heapprofd_client_api.map.txt",
 }
 
 // GN: //src/ipc/protoc_plugin:ipc_plugin