Add a controlled Android scan pause to the manual BLE probe

tools/chatgui-android/app/src/androidTest/java/com/utun/chat/BlePeerProbe.kt

@@ -33,6 +33,10 @@ class BlePeerProbe : Instrumentation() {
                 NativeLib.setChatSetting("bluetooth_invites_enabled", "1")
             }
             check(BleRadio.nativeConfigure(flags)) { "configure refused" }
+            if (args.getString("pauseScan") == "true") {
+                Thread.sleep(2000)
+                check(BleRadio.pauseScanForProbe()) { "pause scan command refused" }
+            }
             val seconds = (args.getString("seconds") ?: "100").toLong()
             require(seconds in 1..600) { "seconds must be in 1..600" }
             if (args.getString("invites") == "true") {

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

@@ -79,6 +79,15 @@ object BleRadio {
         if (NativeLib.isReady() && !nativeConfigure(effective)) log("WARN", "Settings could not be queued")
         if (effective == 0) state.value = 2
     }
+    /** Только ручная instrumentation: отделить влияние scanning от передачи по уже открытому GATT. */
+    fun pauseScanForProbe(): Boolean = worker.post {
+        guarded {
+            val callback = checkNotNull(scan) { "Probe scan is not running" }
+            checkNotNull(scanner).stopScan(callback)
+            scan = null; scanner = null
+            log("INFO", "Scan paused for probe generation=$generation")
+        }
+    }
     private fun log(level: String, text: String) { LogManager.addLog(level, "discovery", "BLE $text") }
     private fun emit(type: Int, token: Long = 0, arg: Int = 0, text: String = "", data: ByteArray = byteArrayOf()) {
         nativeEvent(generation, token, type, arg, text, data)