Treat moving app as installing in new location.

Moving apps to/from SD cards has historically been neglected, meaning
it can easily break.  This happened most recently for split APKs,
64-bit native code, and multiArch support.

To make this easier to maintain, treat move as a no-op upgrade,
following the inheriting code path that split APKs depends on.

Also clean up scary places where different flavors of flags were
being combined, and remove unused flags.  Fix media broadcasts to be
sent based on existing app storage location.

New API to abandon install session without opening it.

Bug: 17158495
Change-Id: Ia33bf8f6fdaae099124dfe534f0e320b37bc8e16