Update to version 2.2.0 to use Android SDK 2.2.0

Author: mirapham

sampleapp/build.gradle

@@ -32,11 +32,11 @@ repositories {
 android {
     compileSdkVersion 29
     defaultConfig {
-        applicationId "sg.com.temasys.skylink.sampleapp_2_1_4"
+        applicationId "sg.com.temasys.skylink.sampleapp_2_2_0"
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 4
-        versionName "2.1.4"
+        versionCode 5
+        versionName "2.2.0"
         multiDexEnabled true
     }
     // Run lint checks but don't abort build
@@ -60,7 +60,7 @@ android {
 
         implementation(group: 'sg.com.temasys.skylink.sdk',
                 name: 'skylink_sdk',
-                version: '2.1.5-RELEASE',
+                version: '2.2.0-RELEASE',
                 ext: 'aar') {
             transitive = true
         }

sampleapp/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <string name="app_name">SampleApp 2.1.4</string>
+    <string name="app_name">SampleApp 2.2.0</string>
     <string name="title_section1"> Audio </string>
     <string name="title_section2"> Video </string>
     <string name="title_section3"> Chat </string>