Revert "Revert "audio policy: implement routing policy for USB docking s...""

This reverts commit 73b6c9635f86ef64cd6c74d82327c12b0255f80f.

Bug: 197584191
Test: make
Change-Id: Id587c2a554a32a138be7a388460554f1664bcffa
diff --git a/services/audiopolicy/engine/common/src/EngineBase.cpp b/services/audiopolicy/engine/common/src/EngineBase.cpp
index 150a9a8..7a06206 100644
--- a/services/audiopolicy/engine/common/src/EngineBase.cpp
+++ b/services/audiopolicy/engine/common/src/EngineBase.cpp
@@ -71,7 +71,10 @@
                                               audio_policy_dev_state_t state)
 {
     audio_devices_t deviceType = devDesc->type();
-    if ((deviceType != AUDIO_DEVICE_NONE) && audio_is_output_device(deviceType)) {
+    if ((deviceType != AUDIO_DEVICE_NONE) && audio_is_output_device(deviceType)
+            && deviceType != AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET) {
+        // USB dock does not follow the rule of last removable device connected wins.
+        // It is only used if no removable device is connected or if set as preferred device
         mLastRemovableMediaDevices.setRemovableMediaDevices(devDesc, state);
     }
 
diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index 4c3d92c..dc34a38 100644
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -272,7 +272,8 @@
         devices = availableOutputDevices.getFirstDevicesFromTypes(
                                           getLastRemovableMediaDevices());
         if (!devices.isEmpty()) break;
-        devices = availableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_EARPIECE);
+        devices = availableOutputDevices.getFirstDevicesFromTypes({
+                AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET, AUDIO_DEVICE_OUT_EARPIECE});
     } break;
 
     case STRATEGY_SONIFICATION:
@@ -364,7 +365,8 @@
                     AUDIO_DEVICE_OUT_ANLG_DOCK_HEADSET);
         }
         if (devices2.isEmpty()) {
-            devices2 = availableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_SPEAKER);
+            devices2 = availableOutputDevices.getFirstDevicesFromTypes({
+                        AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET, AUDIO_DEVICE_OUT_SPEAKER});
         }
         DeviceVector devices3;
         if (strategy == STRATEGY_MEDIA) {