Zen upgrade notification

Test: runtest --path /extra/master/frameworks/base/services/tests/uiservicestests/src/com/android/server/notification/ZenModeHelperTest.java
Change-Id: Ia31f89af74d9bcee40e050bd6cc13f1e6a9a15d9
Fixes: 73000503
Fixes: 72876890
Fixes: 73110052
12 files changed