For #563: Restyles history favicons (#2455)

app/src/main/java/org/mozilla/fenix/library/history/viewholders/HistoryListItemViewHolder.kt

@@ -106,6 +106,9 @@ class HistoryListItemViewHolder(
                 favicon.setImageResource(0)
             }
         } else {
+            val backgroundTint = DefaultThemeManager.resolveAttribute(R.attr.neutral, itemView.context)
+            val backgroundTintList = ContextCompat.getColorStateList(itemView.context, backgroundTint)
+            favicon.backgroundTintList = backgroundTintList
             updateFavIcon(item.url)
         }
     }

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

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="oval">
-    <solid android:color="@color/photonGrey40" />
-</shape>

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

@@ -28,7 +28,8 @@
         android:id="@+id/history_favicon"
         android:layout_width="@dimen/history_favicon_width_height"
         android:layout_height="@dimen/history_favicon_width_height"
-        android:background="@drawable/history_favicon_background"
+        android:background="@drawable/favicon_background"
+        android:padding="10dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />