Mechanical refactoring to improve job dumping.

First, JobStatusFunctor was really Consumer<JobStatus> before we
had the java.util.function APIs, so switch everyone over.  Replace
most usages with lambdas; no additional runtime cost, since existing
code was already creating classes.

Move dump() to accept Predicate<JobStatus> for their filtering
behavior, enabling more future advanced filtering using any
attributes of JobStatus.  Also move dump() to IndentingPrintWriter
to avoid passing around tedious prefix information.  Makes it much
easier to print sane-looking output.

Add IndentingPrintWriter support for initial prefix values.

Test: manual dumpsys output looks sane
Bug: 73019091
Change-Id: I4c2398443b42dfb48135ab900d4331ff6d2bb5c4