Change requests for Rust update v1.66.0

error: casting to the same type is unnecessary

Test: ./build.py --lto=thin
Bug: 263153841
Change-Id: Ibf820a90c36c46155d07176b3194b460904140c9
diff --git a/keystore2/src/legacy_blob.rs b/keystore2/src/legacy_blob.rs
index 7cf1819..2ffcc71 100644
--- a/keystore2/src/legacy_blob.rs
+++ b/keystore2/src/legacy_blob.rs
@@ -321,7 +321,7 @@
                     acc.push(c as char);
                 }
                 c => {
-                    acc.push((b'+' + (c as u8 >> 6)) as char);
+                    acc.push((b'+' + (c >> 6)) as char);
                     acc.push((b'0' + (c & 0x3F)) as char);
                 }
             };