Allow set metered override setting for passpoint

Add API to set the metered override setting (METERED_OVERRIDE_NONE,
METERED_OVERRIDE_METERED, METERED_OVERRIDE_UNMETERED) per passpoint
profile.

Bug: 131273033
Test: atest android.net.wifi
Change-Id: I5eb2640b8fcf61031714c0a819c0cf1ed793416d