test and adopt ZIP 320 in the Android SDK

[true-jared]

• test the implementation by executing testing transactions to a TEX address
• validate the implementation
• trubleshoot any issues with the Core Team if necessary
• adopt ZIP 320 in the Android SDK
• integrate ZIP 320 in the Zashi wallet

[true-jared]

Looks like I cannot close this task @HonzaR, can you try?

[HonzaR]

@true-jared It seems closed to me now.