For #23121 - Replace @drawble/ic_back_button with @drawable/mozac_ic_back

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -700,7 +700,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
             setSupportActionBar(navigationToolbar)
             // Add ids to this that we don't want to have a toolbar back button
             setupNavigationToolbar()
-            setNavigationIcon(R.drawable.ic_back_button)
+            setNavigationIcon(R.drawable.mozac_ic_back)
 
             isToolbarInflated = true
         }

app/src/main/java/org/mozilla/fenix/ext/Fragment.kt

@@ -36,7 +36,7 @@ fun Fragment.getPreferenceKey(@StringRes resourceId: Int): String = getString(re
  */
 fun Fragment.showToolbar(title: String) {
     (requireActivity() as AppCompatActivity).title = title
-    activity?.setNavigationIcon(R.drawable.ic_back_button)
+    activity?.setNavigationIcon(R.drawable.mozac_ic_back)
     (activity as NavHostActivity).getSupportActionBarAndInflateIfNecessary().show()
 }
 

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

@@ -43,7 +43,7 @@ open class LibraryPageView(
         activity?.title = title
         val toolbar = activity?.findViewById<Toolbar>(R.id.navigationToolbar)
         toolbar?.setToolbarColors(foregroundColor, backgroundColor)
-        toolbar?.setNavigationIcon(R.drawable.ic_back_button)
+        toolbar?.setNavigationIcon(R.drawable.mozac_ic_back)
         toolbar?.navigationIcon?.setTint(foregroundColor)
     }
 }

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

@@ -1,14 +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/. -->
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:autoMirrored="true"
-    android:viewportWidth="24"
-    android:viewportHeight="24">
-    <path
-        android:fillColor="?primaryText"
-        android:pathData="M20.25,11.5H5.461L11.431,5.53C11.724,5.237 11.724,4.762 11.431,4.469C11.138,4.176 10.663,4.176 10.37,4.469L3,11.839V12.66L10.37,20.03C10.516,20.176 10.708,20.25 10.9,20.25C11.092,20.25 11.284,20.177 11.43,20.03C11.723,19.737 11.723,19.262 11.43,18.969L5.461,13H20.25C20.664,13 21,12.664 21,12.25C21,11.836 20.664,11.5 20.25,11.5Z" />
-</vector>