Overriding of setHysteresisDb value support

-Set minimum of system/cc/smaller of smallest threshold delta as hysteresis db
 value to ril/modem from framework

Bug: 248861663
Bug: 240215633
Test: manual & atest FrameworksTelephonyTests
Change-Id: I18b17ce6fe15de51df68c3aedca696c36d264be7