[Android] Add new illustrations for Card list message

[anikiki]

Task/Issue URL: https://app.asana.com/1/137249556945/project/1201462886803403/task/1213397161359075?focus=true

Description

Added support for two new remote message placeholders: BOOKMARKS_IMPORT and NEW_TAB_OPTIONS. This includes:

• Added new vector drawable resources bookmarks_import_96.xml and newtab_options_96.xml to the design system
• Added BOOKMARKS_IMPORT and NEW_TAB_OPTIONS enum values to the Placeholder class
• Updated drawable mapping functions in both the app and remote messaging implementation to handle the new placeholders

Steps to test this PR

Code review only.

NO UI changes

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Note

Low Risk
Adds new drawable assets and extends placeholder-to-drawable mappings; risk is limited to incorrect resource wiring or unexpected placeholder values causing UI fallback/crashes.

Overview
Adds support for two new remote message placeholders, BOOKMARKS_IMPORT and NEW_TAB_OPTIONS, including new 96dp vector illustration resources (bookmarks_import_96.xml, newtab_options_96.xml).

Extends the remote messaging API Placeholder enum and updates both app and remote-messaging-impl mappers to resolve these placeholders to the new drawables when rendering remote message cards.

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[anikiki]

• [Android] Add new illustrations for Card list message #7794 👈 (View in Graphite)
• develop

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[catalinradoiu]

LGTM! 👍