Update git submodules

* Update external/rust/crates/serde from branch 'main'
  to 9d1f9ebe86cc030a9d2910f760954f613835d7d3
  - Revert "Trusty: Avoid implicitly depending on rust_support"
    
    This reverts commit b359a1416e0936476a7f2069b3b62f9898017947.
    
    Reason for revert: not required after aosp/3076403
    
    Change-Id: Ia24ad73ef79146fe2b754531c4388448c0db6031
    
1 file changed