Revert "SocketListener: use poll() instead of select()"

This reverts commit 0ad41cf3f44e5403132f7f620d8199446cb815b4.

Reason for revert: Breaks many tests, see b/109745952#comment18 b/109745952#comment20 and b/79838856#comment19 amongst others

Change-Id: I92db38d47cd1dcd7841091e37e3b65dce9456cdf
3 files changed