Only allow clearing of Euicc Data by owner or demo user

Secondary users should not be able to erase downloaded SIMs
is a similar way that they are not be able to factory reset
the device.

Bug: 303488763
Test: On a device with FEATURE_TELEPHONY_EUICC enabled,
      create secondary user, enter Settings->System->Reset Options
      there should be no option to 'Erase downloaded SIMs'
Change-Id: I4f5326732822bc322ab13a00937f94232ca69228