Added new emergency number related device configs.

Added two new emergency number database related device configs to the
telephony device configs file. The first new device configs returns a boolean representing whether modem/config sourced emergency numbers should be ignored. The second new device config returns a boolean representing
whether emergency number routing defined in the android emergency number
database should be ignored.

Bug: 247636518
Test: manual
Change-Id: I532284432841a1990a37d831ed4fad8aae871251