Fixed a few issues with the GroupAvatarDownloadJob

Added a method to remove the Group avatar
Fixed an issue where the recipient diffing on the HomeActivity wasn't working properly
Fixed an issue where the GroupAvatarDownloadJob could be scheduled even when there was already one scheduled

libsignal/src/main/java/org/session/libsignal/database/LokiOpenGroupDatabaseProtocol.kt

@@ -4,4 +4,5 @@ interface LokiOpenGroupDatabaseProtocol {
 
     fun updateTitle(groupID: String, newValue: String)
     fun updateProfilePicture(groupID: String, newValue: ByteArray)
+    fun removeProfilePicture(groupID: String)
 }