Fix instant app filtering in ApplicationsState

This fixes instant apps showing up as installed apps in the settings
UI where they should not be (namely the opening links page).

Test: Added tests for the filter
      runtest -x packages/SettingsLib/tests/integ

Bug: 37108030
Change-Id: I0fc6cfd237d470a1f4dde7b2db38d8b3643ee6f7