Remove unused PackageManagerNative APIs

These APIs was used by IORAP, and some of them aren't well protected.
Since IORAP are removed from Android, removing these APIs to mitigate
the vunlerability.

Bug: 213903886
Test: build
Test: manually using the PoC in the buganizer to ensure the symptom
      no longer exists.
Change-Id: I3e6c9e74476f2a3621a223bbc4851927ddc3d619