Android 7.0.0 release 17
flounder: restore read_ahead/prefetch to default

Large read_ahead and prefetch buffers hurt the device's performance since access
to system is mostly done through random I/O.

Restoring to default values (256kB prefetch and 128kB read_ahead).

Bug: 28904641
Change-Id: I2929df30d3371eff3f79c179118128de51677300
1 file changed