alarm api: rename counter_name to meter_name

We already have a really poor naming convention the metering API, and we
decided to remove the counter term from everywhere. We can't fix the
metering API since we relesed it, so let's fix the alarming one before
it gets released and we have to handle a lot of complicated
compatibility. :-(

Change-Id: I3e3219d2eae0b72ad4a898630cacfd334e9390cc
Merge "alarm api: rename counter_name to meter_name"