Merge "Refresh Android.bp, cargo2android.json, TEST_MAPPING." am: f1974bd83d am: 29922446fc

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-channel/+/1912454

Change-Id: Ibc195e32e8367a4abe11724137887f03492e1066