Clarify&rename wfc_entitlement_required_countries config

Bug: 189960623
Test: make
Change-Id: I51e0319cd60308618364be7462070430387a143c
Merged-In: I51e0319cd60308618364be7462070430387a143c
(cherry picked from commit c9fd0b299363c5994468113bc761ce976e2f95dd)
2 files changed