Remove PackageManager.getResourcesForApplicationAsUser API

To switch another user to do something should create the context of the
specified user by using Context.createContextAsUser rather than call
*AsUser API directly.

Test: make -j droid cts gts vts
Test: make -j docs
Test: atest SystemUITests \
    FrameworksServicesTests:com.android.server.pm
Fix: 170928809
Bug: 72863210
Change-Id: Ie1999ba9cf61a4e85b7172240cb198111389ab73