Improve logging on Android devices

[amCap1712]

Android discards all log output to stdio and stderr by default. There is an option to modify this behaviour but it is only available on rooted devices. Android NDK provides a logging library to be used instead.

[aifbdi]

Android discards all log output to stdio and stderr by default. There is an option to modify this behaviour but it is only available on rooted devices. Android NDK provides a logging library to be used instead.

amCap1712, could you please send me a copy of your compiled Android library Thank you very much! E-mail：[email protected]

[dbogdanov]

Closing as the PR #1009 was merged.