Remove the "stem" field from a target definition am: eeec3f50ac am: 29c9599133 am: 422016309a am: 5d0652826f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/log/+/2466634

Change-Id: I38f980f54896111395c516b0540cbd0f625245c5
Signed-off-by: Automerger Merge Worker <[email protected]>