Revert "Enfore cross user permission to getPackagesForUid"

This reverts commit 1dafc3859a.

Reason for revert: Causes bugs https://b.corp.google.com/issues/179465628 and https://b.corp.google.com/issues/179506602

Fixes: 179506602
Fixes: 179465628
Fixes: 179460585

Change-Id: I0596e45484638e33baccec834a8adf2dfa9f4a4d

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

@@ -3845,8 +3845,6 @@ public class PackageManagerService extends IPackageManager.Stub
             final boolean isCallerInstantApp = getInstantAppPackageName(callingUid) != null;
             final int userId = UserHandle.getUserId(uid);
             final int appId = UserHandle.getAppId(uid);
-            enforceCrossUserPermission(callingUid, userId,
-                    /* requireFullPermission */ false, /* checkShell */ false, "getPackagesForUid");
             return getPackagesForUidInternalBody(callingUid, userId, appId, isCallerInstantApp);
         }