Separate java source list generation into its own rule

Move the java source list generation step into its own rule.  This
has a couple of advantages.  It consolidates the source list
generation so that it only has to run once for javac, jack, and
jack-check.  It also massively reduces the length of the javac
command line, so that error messages are significantly shorter,
and allows easily rerunning the failing build command because
the file list is still on disk.

The primary disadvantage is that javac error messages no longer
include the list of files passed to javac, but the list is
available earlier in the build long when the file list was written,
and is still available on disk.

Test: m -j javac-check
Change-Id: I9730b352b33a060e08221b61c11c617d23320d67