fix(extended-device-information): Fixed Memory Display Bug (#2641)

* Fixed Memory Display Bug with ExtendedDeviceInformation Plugin

* Update index.ts

* Update index.ts

src/@ionic-native/plugins/extended-device-information/index.ts

@@ -4,7 +4,11 @@ import { CordovaProperty, Plugin, IonicNativePlugin } from '@ionic-native/core';
 /**
  * @name Extended Device Information
  * @description
- * Retrieves additional device information that is not provided by other plugins
+ * Retrieves additional device information from the Device Hardware
+ *  - memory
+ *  - cpumhz
+ *  - totalstorage
+ *  - freestorage
  *
  * @usage
  * ```typescript
@@ -22,23 +26,23 @@ import { CordovaProperty, Plugin, IonicNativePlugin } from '@ionic-native/core';
   pluginName: 'ExtendedDeviceInformation',
   plugin: 'cordova-plugin-extended-device-information',
   pluginRef: 'extended-device-information',
-  repo: 'https://github.com/danielehrhardt/cordova-plugin-extended-device-information',
+  repo:
+    'https://github.com/danielehrhardt/cordova-plugin-extended-device-information',
   platforms: ['Android']
 })
 @Injectable()
 export class ExtendedDeviceInformation extends IonicNativePlugin {
-
   /**
    * Get the device's memory size
    */
   @CordovaProperty
-  memory: number;
+  memory: string;
 
   /**
    * Get the device's CPU mhz
    */
   @CordovaProperty
-  cpumhz: string;
+  cpumhz: number;
 
   /**
    * Get the total storage
@@ -46,4 +50,9 @@ export class ExtendedDeviceInformation extends IonicNativePlugin {
   @CordovaProperty
   totalstorage: string;
 
+  /**
+   * Get the total storage
+   */
+  @CordovaProperty
+  freestorage: number;
 }