Mute those annoying SLF4J warnings:
System.err W SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
System.err W SLF4J: Defaulting to no-operation (NOP) logger implementation
System.err W SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Enable for all the modules that produce this unnecessary warning.
Especially useful for people reading logcat that need to see System.err but get confused by SLF4J warnings from other apps.