Use a dark overlay in a hovered tab in select mode (#2805)

Author: keianhzo

app/src/main/res/drawable/tab_overlay_checked.xml

@@ -2,6 +2,7 @@
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true">
         <shape>
+            <solid android:color="#AA000000" />
             <stroke android:color="@color/rhino" android:width="2dp" />
         </shape>
     </item>

app/src/main/res/drawable/tab_overlay_unchecked.xml

@@ -8,7 +8,7 @@
     </item>
     <item android:state_hovered="true" android:state_pressed="false">
         <shape>
-            <stroke android:color="@color/rhino" android:width="2dp" />
+            <solid android:color="#AA000000" />
         </shape>
     </item>
     <item android:state_hovered="false" android:state_pressed="false">