Revert "Adds caller check to getAllPackages()"

This reverts commit f7efdb4222.

Reason for revert: build failure
Bug: 174661955
Change-Id: Ic29331e90176c52a0c562ac119650d0bc0fd9a19
Merged-In: I77460ae19a4d41151577646441f11e2eddbb741a

services/core/java/com/android/server/pm/PackageManagerService.java

@@ -5792,7 +5792,6 @@ public class PackageManagerService extends IPackageManager.Stub
 
     @Override
     public List<String> getAllPackages() {
-        enforceSystemOrRootOrShell("getAllPackages is limited to privileged callers");
         final int callingUid = Binder.getCallingUid();
         final int callingUserId = UserHandle.getUserId(callingUid);
         synchronized (mPackages) {