This CL adds events for:
* QS interactions
* StatusBarState changes
* User Switcher interaction
* DND panel interaction
The new QS events that refer to particular tiles attach the following:
* spec (if framework tile) or package (if CustomTile)
* instanceId associated with the QSTile object on creation
Test: atest SystemUITests (including new tests)
Test: manual using statsd_testdrive
Fixes: 147508235
Change-Id: I43d8fe1fdb2aec1f16032da61a599ebc29809afc
2ff6df973b