%caller and %source do not work properly with slf4j

[almilli]

When using the SLF4J bindings, both %caller and %source always results in AndroidLoggerAdapter as the caller/source instead of the actual class that the SLF4J log call was done in.

#android-logger.properties file
logger.com.example=DEBUG:Example:[%t] %caller{-3.-15}%source

//SLF4J test
private static final Logger log = LoggerFactory.getLogger(MainActivity.class);

public void doTest() {
    log.info("Testing");
}

05-19 09:23:45.129 736-804/com.example.activity D/Syncronous: [main] AndroidLoggerAdapter#log:55(AndroidLoggerAdapter.java:55) Testing