Move Package installer back to AAPT2

This also fixes some issues that we cannot access the resources of the
SettingsLib.

Fixes: 32608113
Test: Checked that the crash of bug 32608113 does not happen anymore.
      Checked that we have hw accelleration even with AAPT2.

Change-Id: I0e0e764ea445fcecc94d6f495fa6ad4b5e889c87