Up the size of the phone icon for recent calls.

Retrieving the bitmap for a VectorDrawable will render it the size that
the VectorDrawable is hardcoded as. As a result, this makes the icon
pixelated when displayed on the home screen. To fix, up the default size
of the icon.

Test: manually tested
Change-Id: I9a657bc46630e6607f523a18eb72b957c3acd5eb
diff --git a/res/drawable/ic_phone.xml b/res/drawable/ic_phone.xml
index fe0f093..015338f 100644
--- a/res/drawable/ic_phone.xml
+++ b/res/drawable/ic_phone.xml
@@ -1,9 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
+        android:width="56dp"
+        android:height="56dp"
         android:viewportWidth="24.0"
         android:viewportHeight="24.0">
     <path
             android:pathData="M6.62,10.79c1.44,2.83 3.76,5.14 6.59,6.59l2.2,-2.2c0.27,-0.27 0.67,-0.36 1.02,-0.24 1.12,0.37 2.33,0.57 3.57,0.57 0.55,0 1,0.45 1,1V20c0,0.55 -0.45,1 -1,1 -9.39,0 -17,-7.61 -17,-17 0,-0.55 0.45,-1 1,-1h3.5c0.55,0 1,0.45 1,1 0,1.25 0.2,2.45 0.57,3.57 0.11,0.35 0.03,0.74 -0.25,1.02l-2.2,2.2z"
             android:fillColor="#000000"/>
-</vector>
\ No newline at end of file
+</vector>