AudioService: fix SCO audio resume after call

In AudioDeviceBroker.setCommunicationRouteForClient(),
if the requested device is SCO audio, start BT SCO audio
not only when SCO was not requested before but also if SCO audio
is not active.

Bug: 206739623
Test: repro steps in bug.
Test: atest AudioCommunicationDeviceTest
Change-Id: I36bd1f32811e0cd4db4ffc54a5fb189f0352cfe8

services/core/java/com/android/server/audio/AudioDeviceBroker.java

@@ -328,7 +328,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
         }
 
         boolean isBtScoRequested = isBluetoothScoRequested();
-        if (isBtScoRequested && !wasBtScoRequested) {
+        if (isBtScoRequested && (!wasBtScoRequested || !isBluetoothScoActive())) {
             if (!mBtHelper.startBluetoothSco(scoAudioMode, eventSource)) {
                 Log.w(TAG, "setCommunicationRouteForClient: failure to start BT SCO for pid: "
                         + pid);