Implement new testing functionality, clean up code

app/src/main/java/de/kuschku/quasseldroid/Quasseldroid.kt

.../java/de/kuschku/quasseldroid/service/BacklogRequester.kt

...uschku/quasseldroid/service/QuasselNotificationBackend.kt

...in/java/de/kuschku/quasseldroid/service/QuasselService.kt

...kuschku/quasseldroid/settings/SettingsMigrationManager.kt

...main/java/de/kuschku/quasseldroid/ui/chat/ChatActivity.kt

.../quasseldroid/ui/chat/buffers/BufferViewConfigFragment.kt

.../kuschku/quasseldroid/ui/chat/input/AutoCompleteHelper.kt

...de/kuschku/quasseldroid/ui/chat/input/ChatlineFragment.kt

...va/de/kuschku/quasseldroid/ui/chat/topic/TopicFragment.kt

...ldroid/ui/coresettings/chatlist/ChatListCreateFragment.kt

...ldroid/ui/coresettings/identity/IdentityCreateFragment.kt

...seldroid/ui/coresettings/network/NetworkCreateFragment.kt

...schku/quasseldroid/ui/info/channel/ChannelInfoFragment.kt

.../de/kuschku/quasseldroid/ui/info/user/UserInfoFragment.kt

...hku/quasseldroid/ui/setup/network/NetworkSetupActivity.kt

...java/de/kuschku/quasseldroid/util/backport/OsConstants.kt

...de/kuschku/quasseldroid/util/helper/CharSequenceHelper.kt

build.gradle.kts

lib/src/main/java/de/kuschku/libquassel/protocol/QTypes.kt