Share filters with web client (#956)

* First step toward synchronized content filters

* Add simple filter management UI

* Remove old regex filter UI

* More cleanup

* Escape filter phrases when applying them via regex

* Apply code review feedback

* Fix live timeline update when filters change

app/src/main/java/com/keylesspalace/tusky/di/ActivitiesModule.kt

@@ -89,4 +89,7 @@ abstract class ActivitiesModule {
     @ContributesAndroidInjector
     abstract fun contributesTabPreferenceActivity(): TabPreferenceActivity
 
-}
+    @ContributesAndroidInjector
+    abstract fun contributesFiltersActivity(): FiltersActivity
+
+}