remove uiupdater

...p/src/main/java/cx/ring/adapters/ConversationAdapter.java

...va/cx/ring/plugins/ButtonPreference/ButtonPreference.java

...n/java/cx/ring/tv/conversation/TvConversationAdapter.java

...ava/cx/ring/tv/conversation/TvConversationViewHolder.java

ring-android/app/src/main/java/cx/ring/utils/UiUpdater.java

...ndroid/app/src/main/java/cx/ring/views/AvatarFactory.java

...p/src/main/java/cx/ring/views/ConversationViewHolder.java

...roid/app/src/main/res/layout/single_button_preference.xml