Crash when selecting Audio: Settings in JuceDemo

Sadly, filtering logcat with ActivityManager doesn’t reveal a whole lot. Open to suggestions.

Phone: Galaxy S7 Edge
Android SDK: 23

OK there was an embarrassing nullptr dereference if OpenSL fails to initialise unexpectedly. However, in addition to that, I’ve noticed that the update to the Android emulator (at least on macOS) broke audio input support. Even Google’s own apps crash when trying to access audio input on the emulator. I’ve added a workaround for this in JUCE.

The fixes will appear on develop soon.