Remove tracking redundanty and assure min interval

A tracking interval should not be less than 100ms
If tracking interval or power mode is updated to
the same value, then start tracking should not be
sent to the modem again.
Fix some issues with multiplex with powerMode.

Change-Id: I91e5d0577569b96179a5337af0fc91641dc126db
CRs-fixed: 2190953
2 files changed