Removed a dependency

app/build.gradle

...java/de/kuschku/libquassel/localtypes/buffers/Buffer.java

.../kuschku/libquassel/localtypes/buffers/ChannelBuffer.java

...de/kuschku/libquassel/localtypes/buffers/QueryBuffer.java

...e/kuschku/libquassel/localtypes/buffers/StatusBuffer.java

...kuschku/libquassel/syncables/types/impl/BufferSyncer.java

.../libquassel/syncables/types/interfaces/QBufferSyncer.java

...ain/java/de/kuschku/quasseldroid_ng/ui/ViewIntBinder.java

...asseldroid_ng/ui/chat/drawer/BufferViewConfigAdapter.java

...chku/quasseldroid_ng/ui/chat/drawer/BufferViewHolder.java

...e/kuschku/quasseldroid_ng/ui/chat/drawer/NetworkItem.java

.../de/kuschku/util/observables/lists/ObservableElement.java

...rc/main/java/de/kuschku/util/ui/ObservableTextBinder.java