Ringer state is saved when zen mode is off

- don't apply zen to ringer if zen didn't change
- save ringer states when zen mode is off

Test: atest frameworks/base/services/tests/uiservicestests/src/com/android/server/notification/ZenModeHelperTest.java
Bug: 73785184
Change-Id: Id628716ab057770ec0107f2bf72b89fa0c305117
2 files changed