Legacy dhcp server can also be enabled by resource config.
Bug: 144814607
Test: -build, flash, boot
-atest TetheringTests
Change-Id: I8ae5fa3d5bbd88129bd0890f71be6f8a1bfec0eb
Copies config_tether_* and entitlement resources from
framework/base/core/res to tethering package. Will have
follow up changes to move overlay and switch tethering to
use this internal resource. duplicated resource in framework
will be removed after fixing all of users(e.g. test, TetherUtil,
Settings, ....).
Bug: 147399354
Test: build
Change-Id: I2a77e5070d53566d5ec3697358a6dbbebb4ff59f