Add dial_string_replace key to CarrierConfig

Add KEY_DIAL_STRING_REPLACE_STRING_ARRAY and default value (null) to
CarrierConfigManager, and remove the references to the old config in
core/res/res/values/[config.xml/symbols.xml]

This value exists to fix http://b/17202092. We specify a map from
dialstrings to replacements for roaming network service numbers which
cannot be replaced on the carrier side.

Merged-In: I852261596d3931f38d5f1c6b3d24ffe27f950458

Bug: 29873049
Change-Id: I99d97bb25ef57c178d004ae17d97a6c7672734e2