[MCPE-186679] Warden sounds can't be modified by sounds.json in a resource pack

When changing the volume of sound events made by the warden in the sounds.json file in a resource pack, then the new modified volume is not applied to the in game

Steps to reproduce:

Create a sounds.json file in a resource pack
Paste the code given below which is supposed to quiet all the warden sounds
Save the file and apply the resource pack and test it in game

{
	"entity_sounds": {
		"entities": {
			"warden": {
				"events": {
					"agitated": {
						"volume": 0
					},
					"angry": {
						"volume": 0
					},
					"attack": {
						"volume": 0
					},
					"death": {
						"volume": 0
					},
					"heartbeat": {
						"volume": 0
					},
					"hurt": {
						"volume": 0
					},
					"listening": {
						"volume": 0
					},
					"listening_angry": {
						"volume": 0
					},
					"nearby_close": {
						"volume": 0
					},
					"nearby_closer": {
						"volume": 0
					},
					"nearby_closest": {
						"volume": 0
					},
					"roar": {
						"volume": 0
					},
					"step": {
						"volume": 0
					}
				},
				"volume": 0
			}
		}
	},
	"individual_event_sounds": {
		"events": {
			"nearby_close": {
				"volume": 0
			},
			"nearby_closer": {
				"volume": 0
			},
			"nearby_closest": {
				"volume": 0
			},
			"sonic_boom": {
				"volume": 0
			},
			"sonic_charge": {
				"volume": 0
			}
		}
	}
}

Expected Result:
All the warden sounds should be muted and shouldn't be heard

Observed Result:
Warden sounds are not muted and can be heard