Is Adobe Flash deprecated with regards to Android Devices and Apps?
Adobe Flash has been deprecated starting Jelly Bean, for reasons only Adobe knows. However, there are still workarounds for installing Flash.

The trend in mobile (Android) development now is using native Android, or HTML5. Flash is discouraged, although there are still Flash websites around. Phones with older versions of Android may be able to access them.

Related: Why does Jelly Bean no longer support Flash?