Change request for Rust v1.64.0

note from clippy: https://rust-lang.github.io/rust-clippy/master/index.html#manual_retain

Please check change for correctness.

bug: 243420629
Test: test_compiler.py
Change-Id: If64daae01c3bf6d83b80f624c1f5603fae171a2d
1 file changed