aaudio: disconnect when onTearDown() called

It will be called, for example, when switching from speaker to Bluetooth.

Bug: 62883778
Test: run a long app and switch to or from Bluetooth
Change-Id: Iafb9b52d85c30fee71de46abfb99a27a1daabf59
diff --git a/services/oboeservice/AAudioServiceEndpoint.cpp b/services/oboeservice/AAudioServiceEndpoint.cpp
index 488063f..1df2365 100644
--- a/services/oboeservice/AAudioServiceEndpoint.cpp
+++ b/services/oboeservice/AAudioServiceEndpoint.cpp
@@ -138,7 +138,7 @@
     }
     mRunningStreams.clear();
     for(auto sharedStream : mRegisteredStreams) {
-        sharedStream->onDisconnect();
+        sharedStream->disconnect();
     }
     mRegisteredStreams.clear();
 }