ParcelFileDescriptor: add support for non-stream socket pairs.
ParcelFileDescriptor: add support for non-stream socket pairs.

For example, we can use this to create SOCK_SEQPACKET socket pairs.

Change-Id: Ief5c1dab3cbbe40a756d37e77968b41511297bec

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base