include mediaType and size in message content

app/build.gradle

...nversations.android.database.ConversationsDatabase/1.json

...conversations/android/xmpp/MessageTransformationTest.java

...in/java/im/conversations/android/database/Converters.java

...sations/android/database/entity/MessageContentEntity.java

.../conversations/android/database/model/MessageContent.java

...s/android/database/model/MessageWithContentReactions.java

...versations/android/transformer/MessageContentWrapper.java

...main/java/im/conversations/android/util/TextContents.java

build.gradle