making it easier to mock alerts and test notifications
move creation of thread to inside notificationutil
create some tests, this will be refactored later to become unit tests using android's testing and mocking framework
fix space between "x new alerts" in notification
tst for multiple users and multiple alerts
group messages, set summary and number of new alerts
add more alerts to single user test
prepend user name when receiving multiple alerts from multiple users
set summary on both multiple and single users
when notification is not expanded, show message of last alert
display maximum of 7 alerts per notification
increase number of alerts in test
refactor to reuse InboxStyle and BigTextStyle code
test for BigTextStyle