MRE: 2GP Profile Filtering

sfdx package version create removes fieldPermissions too aggressively

Issue description

<fieldPermissions> for Event and Task are being removed from Profiles.

Reproduction

Create an unlocked package first:

sfdx package create -t Unlocked --no-namespace --path force-app -n "2GP Profile Filtering"

Now create a package version:

export SF_LOG_LEVEL="debug"
sfdx package version create -x -d force-app -w 20

See output in ~/.sf/sf.log:

The profile "Dummy Profile" from the "/path/to/project/force-app/main/default/profiles/Dummy Profile.profile-meta.xml" directory was added to this package version.
  The "Event.Event_Field__c" profile setting was removed from the "Dummy Profile" profile.
  The "Task.Task_Field__c" profile setting was removed from the "Dummy Profile" profile.