Implement YEC 2025 Takeover for Android Stable

Creating this ticket to have a parent ticket

Launch date for YEC 2025 is October 14. Still need confirmation from TPA

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Each year from ~mid-October through the end of December, the Tor Project runs its year-end fundraising campaign (aka "YEC"). This is the time during which we raise the most money per year from individual donors. A key strategy in this campaign is a branded takeover of about:tor (desktop + mobile) that includes the year-end campaign "mini brand," new assets, a fundraising message, and a donate button.

• Figma files for inspection:
• Illustrations:
• Font:
  • Title
  • Copy
• Color:
  • Background panel:
  • Title and button copy:
  • Body copy:
  • Button background:
  • Highlights:
• Other:
  • Last year's ticket for reference: YEC 2024 Takeover for Android Stable

cc/ @nicob @gaba @bella @morgan