add getBrand() on both android and ios

RNDeviceInfo/RNDeviceInfo.m

@@ -159,6 +159,7 @@ RCT_EXPORT_MODULE()
              @"systemName": currentDevice.systemName,
              @"systemVersion": currentDevice.systemVersion,
              @"model": self.deviceName,
+             @"brand": @"Apple",
              @"deviceId": self.deviceId,
              @"deviceName": currentDevice.name,
              @"deviceLocale": self.deviceLocale,

android/src/main/java/com/learnium/RNDeviceInfo/RNDeviceModule.java

@@ -85,6 +85,7 @@ public class RNDeviceModule extends ReactContextBaseJavaModule {
     constants.put("systemName", "Android");
     constants.put("systemVersion", Build.VERSION.RELEASE);
     constants.put("model", Build.MODEL);
+    constants.put("brand", Build.BRAND);
     constants.put("deviceId", Build.BOARD);
     constants.put("deviceLocale", this.getCurrentLanguage());
     constants.put("deviceCountry", this.getCurrentCountry());

deviceinfo.js

@@ -20,6 +20,9 @@ module.exports = {
   getModel: function () {
     return RNDeviceInfo.model;
   },
+  getBrand: function () {
+    return RNDeviceInfo.brand;
+  },
   getSystemName: function () {
     return RNDeviceInfo.systemName;
   },