Increase the SoundPoolThread queue size to 128 entries.

SoundPoolThread queue is undersized, bump it up to 128 entries.  This
improves the performance of loading camera by unblocking the thread that
asks SoundPool to load sounds.  Longer term, an API for setting this
number of entries should be added.

Bug: 28087906

Change-Id: Ie5cea5d11844cf035ca13979c188f2c57a8e333a
diff --git a/media/jni/soundpool/SoundPoolThread.h b/media/jni/soundpool/SoundPoolThread.h
index d388388..9096aeb 100644
--- a/media/jni/soundpool/SoundPoolThread.h
+++ b/media/jni/soundpool/SoundPoolThread.h
@@ -47,7 +47,7 @@
     void write(SoundPoolMsg msg);
 
 private:
-    static const size_t maxMessages = 5;
+    static const size_t maxMessages = 128;
 
     static int beginThread(void* arg);
     int run();