Allow testing hidden packages on PrivappPermissionsTest

PackageManager#getPackageInfo does not provide an information of hidden
packages by default. MATCH_UNINSTALLED_PACKAGES option is required.
Otherwise testPrivappPermissionsEnforcement fails due to
NameNotFoundException.

Bug: 127914632
Change-Id: If012eca98724e9e34ac307c966407e09cd251668
1 file changed