Revert "Verify PackageManagerShellCommand caller is shell"

This reverts commit dec5b1985f6930856c6fde0be2e9ef47623c7306.

Reason for revert: a culprit of b/210553425

Change-Id: I3c2a7a80c497698c2fbc3e663a0a48004bec7ea8
3 files changed