Re-activate and fix SocketOptions test for SO_RCVBUF.

It turns out that the initial setting for the SO_RVBUF size in
Cuttlefish is bigger than that which can be set through setOption(0
calls (which rely on native code). So I've modified this test to first
minimize the size of the buffers and then maximize it.

Test: atest CtsLibcoreOjTestCases:test.java.net.SocketOptions.MinimumRcvBufferSize
Bug: 218814458
Change-Id: I99e8b9a9ba2cda8ef65e5e5825d00e724799e020
1 file changed