Adapter interface for external PkgMgr module

Adapter interface for external PkgMgr module

PkgQueryInterface class for pkginfo queries instead of functions.
Advantage of this solution is that pkgmgrinfo_pkginfo_get_usr_pkginfo()
is called only once in constructor and handle is freed in destructor.

Submit together:
- https://review.tizen.org/gerrit/#/c/139347/
- https://review.tizen.org/gerrit/#/c/139346/

Change-Id: I820a92eedcbe90d058c1d61f49a595e0444d1fea
Signed-off-by: Damian Pietruchowski <d.pietruchow@samsung.com>