The external code space is required for the sandbox, so enable it on
Android to be able to enable the sandbox there as well in the future.

Bug: v8:11880
Change-Id: Ic7ba29c77affc3e0e83c8a93f2f6f53b3c72b8e8
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3578799Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Samuel Groß <saelo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79924}