audio policy: add more log for preferred device selection

Add more verbose log to audio policy manager AudioTrack and
AudioRecord to debug issues related to preferred capture device
selection.

Test: make
Change-Id: I9685b4c3dfc2b84d7f89a4b33613858138e48a6f
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 2e866ff..ccb82f2 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -2123,8 +2123,9 @@
                                              audio_port_handle_t *portId)
 {
     ALOGV("%s() source %d, sampling rate %d, format %#x, channel mask %#x, session %d, "
-          "flags %#x attributes=%s", __func__, attr->source, config->sample_rate,
-          config->format, config->channel_mask, session, flags, toString(*attr).c_str());
+          "flags %#x attributes=%s requested device ID %d",
+          __func__, attr->source, config->sample_rate, config->format, config->channel_mask,
+          session, flags, toString(*attr).c_str(), *selectedDeviceId);
 
     status_t status = NO_ERROR;
     audio_source_t halInputSource;