Introduce device(s) role for strategy.

Adding interface to get/set/removeDevicesRoleForStrategy. The interfaces
allows to modify the devices' role, such as preferred, for strategy.
Get/set/removePreferredDeviceForStrategy is reimplemented by the new
interfaces.

Test: atest AudioHostTest
Test: atest AudioServiceHostTest
Test: atest AudioServiceTest
Test: atest audiopolicy_tests
Bug: 160352965
Change-Id: I0af737542a8599938cae4e142b733159f21ed5a8
diff --git a/media/libaudioclient/AudioSystem.cpp b/media/libaudioclient/AudioSystem.cpp
index 9f88074..49c4bc0 100644
--- a/media/libaudioclient/AudioSystem.cpp
+++ b/media/libaudioclient/AudioSystem.cpp
@@ -1603,33 +1603,35 @@
     return aps->isCallScreenModeSupported();
 }
 
-status_t AudioSystem::setPreferredDeviceForStrategy(product_strategy_t strategy,
-                                                    const AudioDeviceTypeAddr &device)
+status_t AudioSystem::setDevicesRoleForStrategy(product_strategy_t strategy,
+                                                device_role_t role,
+                                                const AudioDeviceTypeAddrVector &devices)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) {
         return PERMISSION_DENIED;
     }
-    return aps->setPreferredDeviceForStrategy(strategy, device);
+    return aps->setDevicesRoleForStrategy(strategy, role, devices);
 }
 
-status_t AudioSystem::removePreferredDeviceForStrategy(product_strategy_t strategy)
+status_t AudioSystem::removeDevicesRoleForStrategy(product_strategy_t strategy, device_role_t role)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) {
         return PERMISSION_DENIED;
     }
-    return aps->removePreferredDeviceForStrategy(strategy);
+    return aps->removeDevicesRoleForStrategy(strategy, role);
 }
 
-status_t AudioSystem::getPreferredDeviceForStrategy(product_strategy_t strategy,
-        AudioDeviceTypeAddr &device)
+status_t AudioSystem::getDevicesForRoleAndStrategy(product_strategy_t strategy,
+                                                   device_role_t role,
+                                                   AudioDeviceTypeAddrVector &devices)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
     if (aps == 0) {
         return PERMISSION_DENIED;
     }
-    return aps->getPreferredDeviceForStrategy(strategy, device);
+    return aps->getDevicesForRoleAndStrategy(strategy, role, devices);
 }
 
 class CaptureStateListenerImpl : public media::BnCaptureStateListener,