Adding Notification feature to the SimpleTimer

Adding Notification feature to the SimpleTimer. Notification will show
once the count down time is up.
Revert "Merge branch 'master' of https://github.com/android-wear/workspace"

This reverts commit 78519ce162ce5f867fd9ed33e7251b3d089e36db, reversing
changes made to 6a528cbe5edc8b751745c949b3c34e0bb7aaf011.
Adding notification to the simple timer.

Adding notification to the simple timer.
Commit test after switch to Yitao-local

no comments
Merge branch 'Yitao-local'
.gitignore is now working