it is annoying when the back key from android devices is not supported. quitting dialogs, canceling inputs etc... should easily be doable through the android "back."
Yes...very important! It is very anoying without
I haven't voted in either direction. But I agree in some way, though I am reluctant to vote for it as I know from my professional work that his might cause unwanted side-effects.
To name one (which is IMHO key): Redundancy. I am a strict advocate of uniqueness if it comes to UI design.
Please do not take this as an argument against the proposal, but you/we should carefully think about side effects.
It is probably a good idea to let the user activate it or not by configuration.