Allow unsafe operations in unsafe functions in generated code.

This will soon be denied by default, but we trust that what cxx does is
correct.

Bug: 290018030
Test: m rust
Change-Id: If38e434a5d9e3320cfa7e6f686a078f7ee764435
diff --git a/libs/input/rust/lib.rs b/libs/input/rust/lib.rs
index 688d941..1d3c434 100644
--- a/libs/input/rust/lib.rs
+++ b/libs/input/rust/lib.rs
@@ -23,6 +23,7 @@
 pub use input_verifier::InputVerifier;
 
 #[cxx::bridge(namespace = "android::input")]
+#[allow(unsafe_op_in_unsafe_fn)]
 mod ffi {
     #[namespace = "android"]
     unsafe extern "C++" {