Allow passing conv_type from ActionDistributionNetwork to EncodingNetwork

[kochlisGit]

EncodingNetwork currently allows 1D convolutions. However, the ActionDistributionNetwork class does not allow you to pass CONV_TYPE_1D to the parameter "conv_type" of the encoding network.

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[tfboyd]

Closed no CLA. Cleaning up the PRs. We are not watching this very closely....obviously and I wanted to take one last pass to get some of the olds PRs merged or closed