[easy] Outdated Android README Image

[Jack-Khuu]

🐛 Describe the bug

c867660 introduced a new and improved Android app, but the README image still shows the old app in https://github.com/pytorch/torchchat?tab=readme-ov-file#deploy-and-run-on-android

We should update this

Versions

NA

[Jack-Khuu]

cc: @kirklandsign

[kirklandsign]

#1317