Issue 4997 - Use the latest gradle/-wrapper for Android Studio 2.3

libadblockplus-android-webview/build.gradle

 apply plugin: 'com.android.library'
 
 android {
   compileSdkVersion 21
-  buildToolsVersion "24.0.1"
+  buildToolsVersion "25.0.0"
 
   defaultConfig {
     minSdkVersion 21
     targetSdkVersion 21
     versionCode 1
     versionName "1.0"
   }
 
   sourceSets {
     main {
       manifest.srcFile 'AndroidManifest.xml'
       java.srcDirs = ['src']
       resources.srcDirs = ['src']
       res.srcDirs = ['res']
       assets.srcDirs = ['assets']
 
       jni {
         dependencies {
           project ":libadblockplus-android"
         }
       }
     }
   }
 }
 
 dependencies {
     compile project(':libadblockplus-android')
 }