Update TEST_MAPPING am: 6b5472c3fa am: 2f3add0fb8

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/shared_child/+/2107131

Change-Id: Ie5e6d1ab74a0f6c1d4161052a2eaa9c22387fe79
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>