DatagramSocket should set IP_MULTICAST_ALL to 0

Incorrectly removed explicit setting of IP_MULTICAST_ALL in
DatagramSocket rewrite (Libcore change 5e0df135) due to
misinterpretation of the spec, and broke apps that uses Multicast
socket. This change reintroduces the explicit setsockopt during
socket creation.

Tests will be added in a follow-up change.

Test: Manual testing
Bug: 33957878
Change-Id: I665c59372c803df81800ef1a19fca88fd49425ae