Add Android checkout branding configuration

[tiagocandido]

What changes are you making?

Adds an Android Checkout Kit branding configuration option and includes the selected branding when building checkout URLs.

This also passes the configured color scheme into the existing protocol URL builder so checkout receives both visual configuration values consistently.

How to test

• Added coverage for default and configured branding.
• Added Java interop coverage for the new configuration option.
• Added URL coverage for configured color scheme and branding query parameters, including replacement of caller-supplied values.
• Ran Android tests.
• Ran Android API validation.
• Ran Android lint.

---

Before you merge

Important

• I've added tests to support my implementation
• I have read and agree with the Contribution Guidelines
• I have read and agree with the Code of Conduct
• I've updated the relevant platform README (platforms/swift/README.md and/or platforms/android/README.md)

---

Releasing a new Swift version?

• I have bumped the version in ShopifyCheckoutKit.podspec
• I have bumped the version in platforms/swift/Sources/ShopifyCheckoutKit/ShopifyCheckoutKit.swift
• I have updated the SwiftPM/CocoaPods version snippets in platforms/swift/README.md (major version only)

Releasing a new Embedded Checkout Protocol version?

• I have bumped embeddedCheckoutProtocolAndroid in platforms/android/gradle/libs.versions.toml
• I have updated protocol/languages/kotlin/embedded-checkout-protocol/api/embedded-checkout-protocol.api if the public API changed

Releasing a new Android version?

• I have bumped checkoutKitAndroid in platforms/android/gradle/libs.versions.toml
• I have updated the Gradle/Maven version snippets in platforms/android/README.md

Tip

See the Contributing documentation for the full release process per platform.

[github-actions]

React Native — Coverage Report

Lines	Statements	Branches	Functions
	91.85% (327/356)	87.98% (183/208)	100% (86/86)

[github-actions]

Package Size

Platform	Artifact	Base	Head	Delta
Android	release AAR	160.8 KiB	165.6 KiB	+4.7 KiB

Android file breakdown

File	Base	Head	Delta
classes.jar	170.2 KiB	175.2 KiB	+5.0 KiB
res/layout/dialog_checkout.xml	1.3 KiB	1.3 KiB	0 B
proguard.txt	798 B	798 B	0 B
AndroidManifest.xml	578 B	578 B	0 B
res/values/values.xml	564 B	564 B	0 B
R.txt	522 B	522 B	0 B
res/drawable/close.xml	431 B	431 B	0 B
res/menu/checkout_menu.xml	354 B	354 B	0 B
META-INF/com/android/build/gradle/aar-metadata.properties	157 B	157 B	0 B

Measured from the PR base SHA and PR head SHA. The file breakdown shows uncompressed sizes within each package artifact, so individual files do not sum to the compressed artifact total. This comment reports package artifact sizes only; it is not a final app binary-size report.