Merge "Support configurable fade properties" into main

AconfigFlags.bp

media/java/android/media/AudioAttributes.java

media/java/android/media/FadeManagerConfiguration.aidl

media/java/android/media/FadeManagerConfiguration.java

...va/android/media/flags/fade_manager_configuration.aconfig

media/tests/AudioPolicyTest/Android.bp

...est/src/com/android/audiopolicytest/AudioManagerTest.java

...com/android/audiopolicytest/AudioProductStrategyTest.java

...oid/audiopolicytest/FadeManagerConfigurationUnitTest.java

...ava/com/android/server/appop/AudioRestrictionManager.java

...e/java/com/android/server/notification/ZenModeHelper.java

...rc/com/android/server/notification/ZenModeHelperTest.java