Revert "Move tlcd_sock policy over to manta."

This doesn't compile on non-manta devices because of a
missing drmserver_socket declaration.

external/sepolicy/mediaserver.te":68:ERROR 'unknown type drmserver_socket' at token ';' on line 6764:
#line 68
allow mediaserver drmserver_socket:sock_file write;
checkpolicy:  error(s) encountered while parsing configuration
make: *** [out/target/product/flo/obj/ETC/sepolicy_intermediates/sepolicy] Error 1
make: *** Waiting for unfinished jobs....

This reverts commit 8cd400d3.

Change-Id: Ib8f07b57008b9ed1165b945057502779e806f0f8