conversation: Synchronize conversation's preferences

...pp/src/main/java/cx/ring/client/ContactDetailsActivity.kt

.../app/src/main/java/cx/ring/client/ConversationActivity.kt

...-android/app/src/main/java/cx/ring/client/HomeActivity.kt

...ain/java/cx/ring/fragments/ConversationActionsFragment.kt

...p/src/main/java/cx/ring/fragments/ConversationFragment.kt

...ain/java/cx/ring/services/SharedPreferencesServiceImpl.kt

...jamiclient/src/main/kotlin/net/jami/model/Conversation.kt

...lient/src/main/kotlin/net/jami/services/AccountService.kt

...t/src/main/kotlin/net/jami/services/ConversationFacade.kt

...t/src/main/kotlin/net/jami/services/PreferencesService.kt