Merge "Refresh Android.bp, cargo2android.json, TEST_MAPPING." am: 5bdbcff46b am: 0a8fc67a26 am: d002f98c41

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/rand_chacha/+/1912658

Change-Id: Ic53d6eb65fb562a4f998fab74a6265895d37570a