SPINEL_PROP_UNSOL_UPDATE_FILTER value

NCP Unsolicited update filter Format: `A(I)` Type: Read-Write (optional Insert-Remove) Required capability: `CAP_UNSOL_UPDATE_FILTER` Contains a list of properties which are excluded from generating unsolicited value updates. This property is empty after reset. In other words, the host may opt-out of unsolicited property updates for a specific property by adding that property id to this list. Hosts SHOULD NOT add properties to this list which are not present in `PROP_UNSOL_UPDATE_LIST`. If such properties are added, the NCP ignores the unsupported properties.