Prevent LocalSocket from creating an fd if fd is already there

Any LocalSocket created with a FileDescriptor will throw IOExceptions
when performing most opperations due to the fact that the LocalSocket
tries to create an implementation but fails since there is a FileDescriptor
already set.

Bug: 34095140
Test: Setup using tap&go
Change-Id: Ie8f50def6156c16617697d939d6c0ab570281642