audio policy: route media to BT SCO in call

Allow media (and Navigation instructions) to be routed
to BT SCO in call.

Bug: 18986190.

Change-Id: I1fa4decfbf035623fdcc8681b53cbd61e1d5f933
diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index 50f1609..7a785eb 100755
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -498,6 +498,10 @@
                 device2 = availableOutputDevices.types() & AUDIO_DEVICE_OUT_REMOTE_SUBMIX;
             }
         }
+        if (isInCall() && (strategy == STRATEGY_MEDIA)) {
+            device = getDeviceForStrategy(STRATEGY_PHONE);
+            break;
+        }
         if ((device2 == AUDIO_DEVICE_NONE) &&
                 (mForceUse[AUDIO_POLICY_FORCE_FOR_MEDIA] != AUDIO_POLICY_FORCE_NO_BT_A2DP) &&
                 (outputs.getA2dpOutput() != 0)) {