Release Android inflight state at decoder EOS before audio tail

tools/chatgui-android/app/src/test/java/com/utun/chat/data/StreamDecodePumpTest.kt

@@ -95,4 +95,15 @@ class StreamDecodePumpTest {
         codec.pump.step(120000, 200000)
         assertEquals(4L, codec.pump.outputCount); assertEquals(120000L, codec.pump.decoderLeadUs)
     }
+
+    @Test fun emptyEosReleasesTheBufferAndClearsInputsWithoutDisplayPictures() {
+        var finishing = false; var eof = false; var released = 0
+        val pump = StreamDecodePump<Frame>(submit = { true }, receive = {
+            if (finishing && !eof) { eof = true; StreamDecodePump.Output(0, 80000, eos = true, empty = true) } else null
+        }, release = { _, render -> assertFalse(render); released++ })
+        repeat(3) { i -> pump.offer(Frame(i * 40000L), i * 40000L); pump.step(0, i * 40000L) }
+        assertEquals(3, pump.inflight); finishing = true; pump.step(0, 120000)
+        assertTrue(pump.ended); assertEquals(0, pump.inflight); assertEquals(-1L, pump.oldestSubmittedPts)
+        assertEquals(1, released); pump.checkProgress(30_000_000, true)
+    }
 }