Added initial "ShareLocation" UI

Added the UI and some base logic for the share location logic, which
still needs to be enhanced with actual GPS and database logic.

app/src/main/res/layout/helper_group_tile_item.xml

@@ -17,7 +17,7 @@
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
-        tools:src="@drawable/icn_sleep_timer"/>
+        tools:src="@drawable/ic_sleep_timer"/>
 
     <TextView
         android:id="@+id/tv_helper_group_title"
@@ -29,7 +29,7 @@
         tools:text="Sleep Timer"
         android:textStyle="bold"
         android:maxLines="1"
-        android:textColor="@color/md_theme_onBackground_highContrast"
+        android:textColor="@color/md_theme_primary"
         />