Messaging: Use Start and End instead of Left and Right

That way we don't need a separate file for these styles anymore

Change-Id: If689fba727f9b678b628c7bfb51fa8e4474d68de

res/layout/snack_bar.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
     Copyright (C) 2015 The Android Open Source Project
+    Copyright (C) 2025 The LineageOS Project
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -52,8 +53,8 @@
         <TextView
             android:id="@+id/snack_bar_action"
             style="@style/SnackBarText"
-            android:paddingLeft="@dimen/snack_bar_left_right_margin"
-            android:paddingRight="@dimen/snack_bar_left_right_margin"
+            android:paddingStart="@dimen/snack_bar_left_right_margin"
+            android:paddingEnd="@dimen/snack_bar_left_right_margin"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:gravity="center_vertical"
@@ -61,4 +62,4 @@
             android:textAllCaps="true" />
     </LinearLayout>
 
-</LinearLayout>
+</LinearLayout>