1.8 fixes (#637)

* fix lint warnings

* upgrade dependencies

* auto cancel notifications

* improve dependency injection

* fix tests

* remove old comment from BaseActivity

* fix missing injectors

app/src/main/java/com/keylesspalace/tusky/adapter/StatusBaseViewHolder.java

@@ -11,7 +11,6 @@ import android.text.Spanned;
 import android.text.TextUtils;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.CompoundButton;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;

app/src/main/java/com/keylesspalace/tusky/adapter/ThreadAdapter.java

@@ -45,6 +45,7 @@ public class ThreadAdapter extends RecyclerView.Adapter {
         detailedStatusPosition = RecyclerView.NO_POSITION;
     }
 
+    @NonNull
     @Override
     public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
         switch (viewType) {