Add an --abi argument to "pm install"

This allows callers to force an install to a particular
ABI. This is intended only for testing (and CTS) and is
not meant for usage by the installer package.

bug: 14453227

(cherry picked from commit 6431d11c)

Change-Id: I85d4f8785deea02a6a4d3cb0b05e6ef8bf64826b