rust: Add export_include_dirs property to rust_ffi

The cc property include_dirs is neverallowed in certain paths since it
has been deprecated. The property in rust_ffi modules with the same name  functionally works the same way as the CC property export_include_dirs.

To reduce confusion, and avoid triggering the neverallow rule, deprecate
include_dirs and create an export_include_dirs property which does the
same thing. This brings rust module properties into better alignment
with cc module property as well, reducing confusion.

Bug: 330736943
Test: New Soong test
Change-Id: Ib2020a22e6747ac690c46dbff84e38744f93ed15