Add emergency session extension duration (framework)

Add new method in IGnssConfiguration.hal to pass emergency
session extension duration to GNSS HAL implemenation so that
network initiated emergency location requests can be served
for this extra duration post emergency call.

Bug: 121204694
Test: GNSS HAL implementation not ready. So, tested with code
      instrumentation that this configuration parameter is
      called only for GNSS HAL 2.0 implementation.

Change-Id: I845cc13412d9027b7924bfcffecbf6438f2e4be7