keep empty speech result (#1772)

彭震东

2024-05-30 a64b7d8d8aeb2bb543ca703045a45f42470e9a63

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<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <stroke android:width="1dp" android:color="#000000" />
    <padding android:left="5dp" android:top="5dp" android:right="5dp" android:bottom="5dp" />
</shape>