[cr149][Android] Changes for optional/adaptive code in new build target

Chromium changes:
https://chromium.googlesource.com/chromium/src/+/eb9d7815cb653e948dda93f5f7e6df48080ab8ac

commit eb9d7815cb653e948dda93f5f7e6df48080ab8ac
Author: Calder Kitagawa <ckitagawa@chromium.org>
Date:   Tue Apr 21 10:28:47 2026 -0700

    [IA] Move optional/adaptive code to new build target

    When moved to LocationBar this will create a cyclic dependency between
    omnibox and toolbar. Break this by moving the optional/adaptive button
    code to a separate build target.

    Bug: 491511644
    Change-Id: I4531d28de4507d5590f0ba447e6b66cc2a9766a0
    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7771432
    Auto-Submit: Calder Kitagawa <ckitagawa@chromium.org>
    Reviewed-by: Theresa Wellington <twellington@chromium.org>
    Reviewed-by: Sky Malice <skym@chromium.org>
    Commit-Queue: Theresa Wellington <twellington@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#1618292}

browser/ui/android/toolbar/BUILD.gn

@@ -22,7 +22,8 @@ android_library("java") {
     "//chrome/browser/android/lifecycle:java",
     "//chrome/browser/flags:java",
     "//chrome/browser/profiles/android:java",
-    "//chrome/browser/ui/android/toolbar:java",
+    "//chrome/browser/ui/android/toolbar:core_java",
+    "//chrome/browser/ui/android/toolbar:optional_button_java",
     "//ui/android:ui_no_recycler_view_java",
     "//url:url_java",
   ]

build/android/bytecode/bytecode_rewriter.gni

@@ -55,6 +55,7 @@ brave_bytecode_jars = [
   "obj/chrome/browser/ui/android/theme/java.javac.jar",
   "obj/chrome/browser/ui/android/toolbar/core_java.javac.jar",
   "obj/chrome/browser/ui/android/toolbar/java.javac.jar",
+  "obj/chrome/browser/ui/android/toolbar/optional_button_java.javac.jar",
   "obj/chrome/browser/ui/messages/android/java.javac.jar",
   "obj/components/browser_ui/notifications/android/java.javac.jar",
   "obj/components/browser_ui/media/android/java.javac.jar",

test/BUILD.gn

@@ -1597,6 +1597,7 @@ if (is_android) {
       "//chrome/browser/ui/android/signin:java",
       "//chrome/browser/ui/android/theme:java",
       "//chrome/browser/ui/android/toolbar:java",
+      "//chrome/browser/ui/android/toolbar:optional_button_java",
       "//chrome/browser/ui/messages/android:java",
       "//chrome/browser/user_education:java",
       "//chrome/test:test_support_java",