Add additional null checks to scanRecord (#527)

Author: jobfeikens

packages/reactive_ble_mobile/android/src/main/kotlin/com/signify/hue/flutterreactiveble/ble/ReactiveBleClient.kt

@@ -84,7 +84,7 @@ open class ReactiveBleClient(private val context: Context) : BleClient {
                 ScanInfo(result.bleDevice.macAddress, result.scanRecord.deviceName
                     ?: result.bleDevice.name ?: "",
                     result.rssi,
-                    result.scanRecord.serviceData.mapKeys { it.key.uuid },
+                    result.scanRecord.serviceData?.mapKeys { it.key.uuid } ?: emptyMap(),
                     result.scanRecord.serviceUuids?.map { it.uuid } ?: emptyList(),
                     extractManufacturerData(result.scanRecord.manufacturerSpecificData))
             }

packages/reactive_ble_mobile/android/src/main/kotlin/com/signify/hue/flutterreactiveble/converters/ManufacturerDataConverter.kt

@@ -2,10 +2,10 @@ package com.signify.hue.flutterreactiveble.converters
 
 import android.util.SparseArray
 
-fun extractManufacturerData(manufacturerData: SparseArray<ByteArray>): ByteArray {
+fun extractManufacturerData(manufacturerData: SparseArray<ByteArray>?): ByteArray {
     val rawData = mutableListOf<Byte>()
 
-    if (manufacturerData.size() > 0) {
+    if (manufacturerData != null && manufacturerData.size() > 0) {
         val companyId = manufacturerData.keyAt(0)
         val payload = manufacturerData.get(companyId)