Reduce buffer sizes related to HTTP media data transfer in order to reduce the probability of a connection timeout/reset due to long periods of time between socket activity.

Change-Id: I799ce1d58d56a31088a89603d8a18d24780f5b57
related-to-bug: 2492187

include/media/stagefright/HTTPDataSource.h

@@ -50,7 +50,7 @@ protected:
 
 private:
     enum {
-        kBufferSize = 64 * 1024
+        kBufferSize = 32 * 1024
     };
 
     String8 mHeaders;

media/libstagefright/DataSource.cpp

@@ -102,7 +102,7 @@ sp<DataSource> DataSource::CreateFromURI(
         source = new FileSource(uri + 7);
     } else if (!strncasecmp("http://", uri, 7)) {
         source = new HTTPDataSource(uri, headers);
-        source = new CachingDataSource(source, 64 * 1024, 10);
+        source = new CachingDataSource(source, 32 * 1024, 20);
     } else {
         // Assume it's a filename.
         source = new FileSource(uri);

media/libstagefright/StagefrightMetadataRetriever.cpp

@@ -20,7 +20,6 @@
 
 #include "include/StagefrightMetadataRetriever.h"
 
-#include <media/stagefright/CachingDataSource.h>
 #include <media/stagefright/ColorConverter.h>
 #include <media/stagefright/DataSource.h>
 #include <media/stagefright/FileSource.h>