Fix typo in filename: grpc-bindings.rs

- grpc-bindings.rs is used for Cargo build on Windows

Test: TH
Change-Id: I133b21e83f8e7cd4877fca4a0ebcbf3c516b0c66
diff --git a/android/grpc-bindigs.rs b/android/grpc-bindings.rs
similarity index 100%
rename from android/grpc-bindigs.rs
rename to android/grpc-bindings.rs