wakelock == 1 not preventing screen from locking on sdl2

[brentpicasso]

After migrating to Kivy 1.10 / latest p4a I'm seeing the case where android device is not staying awake where it should be.

wakelock == 1 (android.wakelock = True in buildozer.spec) and android permissions include WAKE_LOCK.

our buildozer.spec file has not changed in this area when it was built for 1.9.1, and wakelock was working as expected.

I hacked PythonActivity.java to output some debug information if it chose the branch to set wakelock, and I was able to see it setting the wakelock in action. See screenshots:

Running latest buildozer / kivy / py4a

Let me know how else I can help debug.

[brentpicasso]

One more thing I noticed; the implementation for the pygame bootstrap has the wakelock.acquire() / release() in the onResume() and onPause() methods.
https://github.com/kivy/python-for-android/blob/c36cf0df31a95f974a3ca2717451c0b186b7c90b/pythonforandroid/bootstraps/pygame/build/src/org/renpy/android/SDLSurfaceView.java

In the SDL2 implementation I don't see the equivalent code.

I hacked in a forced acquire as a test:

And this seemed to keep my device on.

If I'm on to something I'd be happy to submit a PR. Let me know - thank you.