While the defaults (logd or stderr) make sense for most use cases,
there are places that can only log to the kernel, or need to log to a
file, etc.
Allow the user to pass in an arbitrary logging object, and provide
LogdLogger and StderrLogger as defaults.
Change-Id: I62368acc795ff313242bb205d65017404bf64e88
ART already had a flavor of this, but it was specialized for their use
case a bit.
Note that the logging.* tests are currently disabled for the device
because there is no good way to capture the output of liblog. We can
make something that will execute logcat and then then scan the output,
but that's messy. Since we know it at least works on the host, we can
add better device tests later.
Change-Id: I47acd87a3312c0a5285b03f9c8dadef0c669f06a
Dan Albert