Add count and logic for sms metrics.

Add count field to SmsOutgoing and SmsIncoming.
Change logic when over 25 sms:
If there is a similar sms then update count
else replace the lowest count sms with the new one.

Bug: 233264472
Test: make, manual --Checking if after 25 outgoing and incoming sms, the count is updated

Change-Id: I323e2b593698af7945ad2db4f1d9ba030e1b5ea9