audio: Fix incall device switch handling

The whole code block was no-op, since we would override
(in|out)_snd_device at a later point anyways.

Change-Id: Ieb2b0918c9c72f18d195d6b34b5c9768fce130b3
(cherry picked from commit f33a728b205f7656ca6211a07e3dd69c623b75ca)

audio/audio_hw.c

@@ -1060,8 +1060,11 @@ static int select_devices(struct audio_device *adev,
         if (vc_usecase == NULL) {
             ALOGE("%s: Could not find the voice call usecase", __func__);
         } else {
-            in_snd_device = vc_usecase->in_snd_device;
-            out_snd_device = vc_usecase->out_snd_device;
+            ALOGV("%s: in call, reusing devices (rx: %s, tx: %s)", __func__,
+                  get_snd_device_display_name(vc_usecase->out_snd_device),
+                  get_snd_device_display_name(vc_usecase->in_snd_device));
+            usecase->devices = vc_usecase->devices;
+            return 0;
         }
     }