aaudio: reserve some error codes

These codes were unused or redundant.

Bug: 37755198
Test: CTS test_aaudio_misc.cpp
Change-Id: I46797b9fba9406b9c98d4b9aa49f0cacbec332b9
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/media/libaaudio/src/client/AudioStreamInternal.cpp b/media/libaaudio/src/client/AudioStreamInternal.cpp
index 701f698..60e836f 100644
--- a/media/libaaudio/src/client/AudioStreamInternal.cpp
+++ b/media/libaaudio/src/client/AudioStreamInternal.cpp
@@ -494,7 +494,7 @@
         default:
             ALOGE("WARNING - AudioStreamInternal::processCommands() Unrecognized what = %d",
                  (int) message.what);
-            result = AAUDIO_ERROR_UNEXPECTED_VALUE;
+            result = AAUDIO_ERROR_INTERNAL;
             break;
         }
     }