feat: implement notification badge using markers from @sk22.

Thank you a lot man! This improvement is amazing

mastodon/src/main/res/layout/tab_bar.xml

@@ -51,7 +51,6 @@
 			android:scaleType="center"
 			android:contentDescription="@string/notifications"
 			android:background="?android:selectableItemBackgroundBorderless"
-			android:tint="?android:colorPrimary"
 			android:src="@drawable/ic_fluent_alert_28_selector"/>
 
 		<Space