Removed get-metered-network command.

The behavior of this command was not well specified in case of errors,
so it's better to remove it and let clients use 'list wifi-networks'
instead, checking for the value of the 'metered' column.

BUG: 27808364

Change-Id: I3f4216c143b4b2a803b99002585fafe0e3885665
2 files changed