feat(docs): Update to latest Android SDK version (#1597)

Author: nomyzs

src/pages/guides/installing-livechat/android-widget/index.mdx

@@ -26,6 +26,8 @@ The Android SDK is compatible with:
 - Android 5.0 (API level 21) or higher
 - Java 8 or higher
 
+When supporting Android API levels below 24, enable Java 8 API desugaring.
+
 ## Installation
 
 To install the SDK, first add the JitPack repository to your root `build.gradle`:
@@ -51,7 +53,7 @@ Next, add dependency to your app's `build.gradle`:
 
 ```kotlin
 dependencies {
-    implementation 'com.github.livechat:chat-window-android:3.0.0'
+    implementation 'com.github.livechat:chat-window-android:3.0.2'
 }
 ```