Make resolverOptions in ResolverParamsParcel nullable and add a new IPC setResolverOption

This information was only ever supplied by OEM code and DnsManager has never
set it to anything.

The new IPC is used to set resolver options separately.

Bug: 194048056
Test: m dnsresolver_aidl_interface-update-api
Change-Id: I81f4b12dbb06783b72883572926b2e423220a9f7
Merged-In: I81f4b12dbb06783b72883572926b2e423220a9f7