[Security] Implement certificate pinning
## Description
The Google Play Store implements certificate pinning for all connections to Google. This should be done in Aurora Store for all connections to Google.
## Examples
- https://github.com/GrapheneOS/Auditor/blob/main/app/src/main/res/xml/network_security_config.xml
- https://developer.android.com/training/articles/security-config#CertificatePinning
## Additional context
This is an important security feature.
issue