build(android): keep Kotlin plugin for compatibility

Author: Tinnci

packages/battery_plus/battery_plus/android/build.gradle

@@ -10,6 +10,7 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:8.12.1'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
 
@@ -21,6 +22,7 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     namespace 'dev.fluttercommunity.plus.battery'

packages/network_info_plus/network_info_plus/android/build.gradle

@@ -22,6 +22,7 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     namespace 'dev.fluttercommunity.plus.network_info'

packages/package_info_plus/package_info_plus/android/build.gradle

@@ -23,6 +23,7 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     namespace 'dev.fluttercommunity.plus.packageinfo'

packages/sensors_plus/sensors_plus/android/build.gradle

@@ -22,6 +22,7 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     namespace 'dev.fluttercommunity.plus.sensors'