Expose filtered Android call buffer diagnostics over JNI

tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt

@@ -271,6 +271,8 @@ object NativeLib {
     fun callAudioProgress(callId: Long, epoch: Long, position: Long, nowUs: Long) = nativeCallAudioProgress(callId, epoch, position, nowUs)
     /** out: epoch, source_epoch, played, written, pts_us, valid, measured, held_back_us. */
     fun callAudioClock(callId: Long, nowUs: Long, out: LongArray): Boolean = nativeCallAudioClock(callId, nowUs, out)
+    /** call=debug: encoded_ms, processing_ms, reserve_ms, spread_ms, pcm_samples, tempo_x100, underruns, waiting. */
+    fun callAudioDiagnostics(callId: Long, out: LongArray): Boolean = nativeCallAudioDiagnostics(callId, out)
     fun callAudioStop() { nativeCallAudioStop() }
 
     /* AEC (эхоподавление): включается по спикерфону; delay — измеренная задержка в кадрах. */
@@ -404,6 +406,7 @@ object NativeLib {
     private external fun nativeCallAudioPull(callId: Long, out: ShortArray): Int
     private external fun nativeCallAudioProgress(callId: Long, epoch: Long, position: Long, nowUs: Long)
     private external fun nativeCallAudioClock(callId: Long, nowUs: Long, out: LongArray): Boolean
+    private external fun nativeCallAudioDiagnostics(callId: Long, out: LongArray): Boolean
     private external fun nativeCallAudioStop()
     private external fun nativeCallAudioSetAec(enabled: Boolean)
     private external fun nativeCallAudioSetAecDelay(frames: Int)