Update TEST_MAPPING am: d65235cf22 am: ba2fda9094 am: fbbac2dbd4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/cexpr/+/2106882

Change-Id: I3882be14c62c3683778fce04b643229cb31e603d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>