fix(android): wire MP3 fallback call, prevent double-speaking

- Codex P1: streamAndPlayMp3 was computed but never called after PCM
  failure. Now properly invoked as fallback.
- Codex P2: MicCaptureManager.speakAssistantReply now skipped when
  TalkModeManager.ttsOnAllResponses is active, preventing both
  pipelines from speaking the same assistant reply.

apps/android/app/src/main/java/ai/openclaw/android/NodeRuntime.kt

@@ -361,7 +361,11 @@ class NodeRuntime(context: Context) {
         parseChatSendRunId(response) ?: idempotencyKey
       },
       speakAssistantReply = { text ->
-        voiceReplySpeaker.speakAssistantReply(text)
+        // Skip if TalkModeManager is handling TTS (ttsOnAllResponses) to avoid
+        // double-speaking the same assistant reply from both pipelines.
+        if (!talkMode.ttsOnAllResponses) {
+          voiceReplySpeaker.speakAssistantReply(text)
+        }
       },
     )
   }