Use '~/.python-for-android' as storage_dir

[cbenhagen]

fixes #622

[inclement]

I think it's best to use the platform standards where possible (e.g. ~/.local on linux, following the xdg spec), but it would be fine to make an exception for OS X or (if this doesn't affect everyone - I did think people had used OS X successfully) to check if the path will work before choosing a dir.

[cbenhagen]

Just as a reminder: We need to update this too:
https://github.com/kivy/buildozer/blob/master/buildozer/targets/android_new.py#L43-L44

[kived]

It probably just shouldn't be hard-coded in buildozer at all. buildozer should ask p4a where the dist dir is.

[cbenhagen]

👍

[kived]

#622 was closed by #720, which adds a --storage-dir option. Buildozer implemented this option in kivy/buildozer#323.