aaudio: plug some resource leaks

Close some file descriptors for shared memory that were not getting closed.

Bug: 37947848
Test: see bug for test procedure
Change-Id: Icdc13188b0a49d08b67babff0852c3a4eda8fd2b
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/services/oboeservice/AAudioServiceStreamBase.cpp b/services/oboeservice/AAudioServiceStreamBase.cpp
index d8882c9..8248f8b 100644
--- a/services/oboeservice/AAudioServiceStreamBase.cpp
+++ b/services/oboeservice/AAudioServiceStreamBase.cpp
@@ -59,6 +59,7 @@
     std::lock_guard<std::mutex> lock(mLockUpMessageQueue);
     delete mUpMessageQueue;
     mUpMessageQueue = nullptr;
+
     return AAUDIO_OK;
 }