Is there a way to vertically flip everything around on android?
Basically redirect or reorganize everything for which order it will be displayed in. The further up the screen something was programmed to be displayed, that will force it to be further down the screen in this new mode.
For example, to compose this thread in the new mode, the notification tray would now be at the very bottom. The next thing would be the title banner with the back arrow, attach icon, and send icon. Then further up the screen you'd see the body of the application.