Reject profiles, guest users and restricted profiles in setUserAdmin()

These users should not be allowed to become admin.

Bug: 411194997
Test: atest FrameworksServicesTests
          --test-filter=".UserManagerTest#testSetUserAdmin.*"
Test: Manually test with CL:33082444 as follows:
  $ adb shell pm create-user --profileOf cur --managed "User11"
  Success: created user id 11
  $ adb shell cmd user set-user-admin 11
  $ adb shell cmd user list -v | grep id=11
  2: id=11, ... flags=MANAGED_PROFILE|PROFILE (parentId=10)
  $ adb shell pm create-user --guest "User12"
  $ adb shell cmd user set-user-admin 12
  $ adb shell cmd user list -v | grep id=12
  3: id=12, ... flags=EPHEMERAL|EPHEMERAL_ON_CREATE|FULL|GUEST
  $ adb shell pm create-user --profileOf cur --restricted "User13"
  $ adb shell cmd user set-user-admin 13
  $ adb shell cmd user list -v | grep id=13
  4: id=13, ... flag=FULL|RESTRICTED
Flag: EXEMPT bug fix

Change-Id: Icd65f536a71c7e18dae6bacebaae09aa09a3794f