Dialer: Provide proper margin to back icon

Currently the icon is squeezed to the right, leading to the ripple not
being displayed properly (parts are going out of the screen). Using
the same margin as the overflow icon fixes that behavior

Change-Id: Ide6c44230546b3a6ce0bfbb88a039598db9efb18
diff --git a/java/com/android/dialer/dialpadview/res/layout/dialpad_view_unthemed.xml b/java/com/android/dialer/dialpadview/res/layout/dialpad_view_unthemed.xml
index 2410853..431e44d 100644
--- a/java/com/android/dialer/dialpadview/res/layout/dialpad_view_unthemed.xml
+++ b/java/com/android/dialer/dialpadview/res/layout/dialpad_view_unthemed.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
      Copyright (C) 2015 The Android Open Source Project
-     Copyright (C) 2023 The LineageOS Project
+     Copyright (C) 2023-2024 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.
@@ -18,6 +18,7 @@
 <com.android.dialer.dialpadview.DialpadView
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/dialpad_view"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -72,7 +73,8 @@
       android:id="@+id/digits_container"
       android:layout_width="match_parent"
       android:layout_height="?attr/dialpad_digits_adjustable_height"
-      android:orientation="horizontal">
+      android:orientation="horizontal"
+      tools:layout_height="50dp">
 
     <ImageButton
         android:id="@+id/dialpad_back"
@@ -102,7 +104,8 @@
         android:src="@drawable/quantum_ic_more_vert_vd_theme_24"
         android:tintMode="src_in"
         android:visibility="gone"
-        app:tint="@color/dialer_theme_color_light" />
+        app:tint="@color/dialer_theme_color_light"
+        tools:visibility="visible"/>
 
       <FrameLayout android:layout_width="0dp"
           android:layout_height="match_parent"
@@ -143,6 +146,7 @@
         android:layout_height="match_parent"
         android:paddingLeft="@dimen/dialpad_digits_padding"
         android:paddingRight="@dimen/dialpad_digits_padding"
+        android:layout_margin="@dimen/dialpad_overflow_margin"
         android:background="@drawable/btn_dialpad_key"
         android:contentDescription="@string/description_delete_button"
         android:src="@drawable/quantum_ic_backspace_vd_theme_24"