Update some APIs based on the 7.2 API review comments

* NotificationConfiguration "helpers" removed from Notification
* NotificationConfiguration methods accept Type instead of style (String)
* Tab.setIconAltText -> Tab.setIconAlternateText
* Remove the two new TabSheet.addTab() methods
* UI.reinit() -> UI.refresh()

Change-Id: I97488e7c6de8cfacc591450d69c821b2973b8707
Fix NPE when removing tabsheet (#13402)

Change-Id: Idc78fc1bc6380d7bfada99f1efe2484b04ce3c74
Merge changes from origin/7.2

d2e24fe Update some APIs based on the 7.2 API review comments
758f26b Fix NPE when removing tabsheet (#13402)

Change-Id: Ic23793738c866d3b6d1a376f37dc4a56f72b8e43