Fix cexpr/METADATA am: fe3d007898 am: e79a091645 am: 10d59f1ac9 am: a085a01b92 am: aba5e1e212

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/cexpr/+/1414011

Change-Id: I5054934caa54bac0e2189dbc868e5c3cff216bb7