For #8972 Replaced purple colors to match the rest of the app

app/src/main/java/org/mozilla/fenix/library/LibraryPageView.kt

@@ -40,7 +40,7 @@ open class LibraryPageView(
         updateToolbar(
             title = title,
             foregroundColor = ContextCompat.getColor(context, R.color.white_color),
-            backgroundColor = context.getColorFromAttr(R.attr.accentHighContrast)
+            backgroundColor = context.getColorFromAttr(R.attr.accent)
         )
         libraryItemsList.adapter?.notifyDataSetChanged()
     }

app/src/main/res/color/tab_checkbox_tint.xml

@@ -0,0 +1,7 @@
+<?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/. -->
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="?secondaryText" android:state_checked="false" />
+    <item android:color="?accent" android:state_checked="true" />
+</selector>

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

@@ -5,5 +5,5 @@
 
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
     <corners android:radius="8dp"/>
-    <solid android:color="?accentBright" />
+    <solid android:color="?accent" />
 </shape>

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

@@ -73,7 +73,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_margin="8dp"
-            android:buttonTint="?accentBright"
+            android:buttonTint="@color/tab_checkbox_tint"
             android:clickable="false"
             android:elevation="1dp"
             app:layout_constraintBottom_toBottomOf="parent"

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

@@ -34,7 +34,7 @@
                 android:layout_height="match_parent"
                 android:padding="10dp"
                 android:background="@drawable/favicon_background"
-                android:backgroundTint="?accentHighContrast"
+                android:backgroundTint="?accent"
                 app:srcCompat="@drawable/mozac_ic_check" />
     </ImageSwitcher>