Add support for querying if a stream is active remotely

Bug 7485803

Change-Id: I0744374f130fd2dd0714102354cffed2fa915361
diff --git a/media/libmedia/AudioSystem.cpp b/media/libmedia/AudioSystem.cpp
index 028e4a3..693df60 100644
--- a/media/libmedia/AudioSystem.cpp
+++ b/media/libmedia/AudioSystem.cpp
@@ -731,6 +731,16 @@
     return NO_ERROR;
 }
 
+status_t AudioSystem::isStreamActiveRemotely(audio_stream_type_t stream, bool* state,
+        uint32_t inPastMs)
+{
+    const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();
+    if (aps == 0) return PERMISSION_DENIED;
+    if (state == NULL) return BAD_VALUE;
+    *state = aps->isStreamActiveRemotely(stream, inPastMs);
+    return NO_ERROR;
+}
+
 status_t AudioSystem::isSourceActive(audio_source_t stream, bool* state)
 {
     const sp<IAudioPolicyService>& aps = AudioSystem::get_audio_policy_service();