A logger which uses android logging backend

This, of course, works only under android and requires linking to log which is only available under android.

Example:

```rust

[macro_use] extern crate log;

extern crate android_logger;

use log::LogLevel;

fn nativeactivitycreate() { androidlogger::initonce(LogLevel::Trace); // trace == verbose

trace!("this is a verbose {}", "message");
error!("this is printed by default");

} ```

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.