fix: add libasound2-dev to Docker image for Linux audio builds

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/Dockerfile.android-builder

@@ -34,6 +34,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
         zip \
         openjdk-17-jdk-headless \
         ca-certificates \
+        libasound2-dev \
     && rm -rf /var/lib/apt/lists/*
 
 # ── Android SDK + NDK 26.1 ──────────────────────────────────────────────────