Fix example app Android builds (#162)

Tested on Web, MacOS, Linux and iOS too - refreshed Podfiles and Runnners

example/android/.gitignore

@@ -11,3 +11,4 @@ GeneratedPluginRegistrant.java
 key.properties
 **/*.keystore
 **/*.jks
+/app/.cxx/

example/android/app/build.gradle

@@ -24,7 +24,7 @@ if (flutterVersionName == null) {
 
 android {
     namespace "com.navideck.universal_ble_example"
-    compileSdkVersion 34
+    compileSdkVersion 35
     ndkVersion flutter.ndkVersion
 
     compileOptions {
@@ -45,7 +45,7 @@ android {
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
         minSdkVersion 21
-        targetSdkVersion 34
+        targetSdkVersion 35
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip

example/android/settings.gradle

@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"