Revert "Use Rust 1.46.0 prebuilts"

This reverts commit cabcbb6c144eb462a94747bd15c8fee8dda57d90.

Fixing the build so that we can pick another prebuilt with a working
cargo.

Bug: 169246218
Change-Id: Ib54b7910eb853e07ad76d6460178a9f41cc131dc
1 file changed