fix Android example app

android/build.gradle

@@ -28,10 +28,7 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 31
-
-    //ndkVersion '21.1.6352462'
-    ndkVersion '23.1.7779620'
-
+    ndkVersion '25.2.9519653'
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
@@ -46,13 +43,16 @@ android {
     }
 
     defaultConfig {
-        minSdkVersion 21
+        minSdkVersion 22
+        ndk {
+            abiFilters 'arm64-v8a' // 'x86_64' 'armeabi-v7a' 
+        }
     }
-
     
     externalNativeBuild {
         cmake {
             path "CMakeLists.txt"
+            version "3.18.1"
         }
     }
 }