build: update Android SDK versions

- Update compile SDK version to 36 and build tools version to "36.0.0"
- Change min SDK version to 21 and target SDK version to 36 in the Android build configuration
- Update compile SDK version to 36 and target SDK version to 36 in the example app build.gradle file

Author: muzahidul-opti

android/build.gradle

@@ -24,10 +24,10 @@ rootProject.allprojects {
 
 
 ext {
-    compile_sdk_version = 35
-    build_tools_version = "35.0.0"
+    compile_sdk_version = 36
+    build_tools_version = "36.0.0"
     min_sdk_version = 21
-    target_sdk_version = 35
+    target_sdk_version = 36
 }
 
 android {

example/android/app/build.gradle

@@ -25,7 +25,7 @@ if (flutterVersionName == null) {
 
 android {
     namespace "com.optimizely.optimizely_flutter_sdk_example"
-    compileSdkVersion 35
+    compileSdkVersion 36
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -38,7 +38,7 @@ android {
         // You can update the following values to match your application needs. 
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
         minSdkVersion flutter.minSdkVersion
-        targetSdkVersion 35
+        targetSdkVersion 36
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }