fix(android): DataSpace impls Display not Debug — use {ds} in HDR logs

ndk's DataSpace derives Copy/PartialEq/Eq and impls Display (no Debug), so the
{ds:?} in the HDR dataspace log statements wouldn't compile under cargo-ndk.
Host clippy can't catch it — decode.rs is android-gated. Switch to {ds}.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

clients/android/native/src/decode.rs

@@ -218,10 +218,10 @@ fn drain(codec: &MediaCodec, window: &NativeWindow, applied_ds: &mut Option<Data
                         match window.set_buffers_data_space(ds) {
                             Ok(()) => {
                                 *applied_ds = Some(ds);
-                                log::info!("decode: HDR stream → Surface dataspace {ds:?}");
+                                log::info!("decode: HDR stream → Surface dataspace {ds}");
                             }
                             Err(e) => log::warn!(
-                                "decode: set_buffers_data_space({ds:?}) failed (non-fatal): {e}"
+                                "decode: set_buffers_data_space({ds}) failed (non-fatal): {e}"
                             ),
                         }
                     }