expand who can uninstall an instant app

More than just those with the ACCESS_INSTANT_APP
permission should be able to uninstall instant apps.
Any uid that can see instant apps [that includes
the shell and some others] should be able to
uninstall them.

Change-Id: Iea24e5a1cdb369bdf29e7cf5db7977db63faedfc
Fixes: 62406346
Test: cts-tradefed run commandAndExit cts-dev -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.EphemeralTest