More work towards triaging missing app behavior.

Many places across the platform query package details without
gracefully handling packages or components that go missing for
various reasons.  This can cause annoying user data loss, such as
resetting back to built-in apps or dropping of accounts, etc.

This change verifies that system callers have thought about these
edge cases by logging if they use default matching behaviors without
explicitly marking themselves as being "triaged."  (The logging is
currently disabled by default.)

Also creates explicit definitions of supported flags for various
incoming PackageManager calls, and defines a clear distinction
between flag types:

-- GET-style flags are used to request additional data that may have
been elided to save wire space.

-- MATCH-style flags are used to include components or packages that
would have otherwise been omitted from a result set by current system
state.

There are a handful of existing GET flags that better fit under the
MATCH definition, so this change clones them to new constants and
marks the old ones as deprecated.

Fixes bug in JobSchedulerService to consider jobs from apps on
external storage.  Revert some dialer behavior back to being
untriaged.

Change-Id: I9b6ab0968241e3479bddbd78de0c51e3b9917318