[ Enhancement ]Inconsistent Flag Emoji Display on Different Android Emulator Versions

[AaryaZ]

Description:
Just now, I tested the country_picker package on two different emulators with different Android versions. I observed that the flag emoji display behavior varies between the emulators:

Pixel 4 XL API 22 emulator	Pixel 7 Pro API 30 emulator

Goal:
The goal is to ensure that the country_picker package runs consistently across all versions of emulators and devices. There should be a way to separate the package's text rendering technique from platform-specific dependencies. By adopting a standardized approach, the package can achieve greater compatibility and reliability across different platforms.