Removed Android AIDL from build scrips and tutorials as it's not needed since 4.9.0.

modules/java/android_sdk/android_gradle_lib/build.gradle

@@ -42,7 +42,6 @@ android {
         main {
             jniLibs.srcDirs = ['../../jni']
             java.srcDirs = ['src']  // TODO Use original files instead of copied into build directory
-            aidl.srcDirs = ['src']
             res.srcDirs = ['@OpenCV_SOURCE_DIR@/modules/java/android_sdk/android_gradle_lib/res']
             manifest.srcFile 'AndroidManifest.xml'
         }

modules/java/android_sdk/build.gradle.in

@@ -121,8 +121,6 @@ android {
         targetCompatibility JavaVersion.VERSION_@ANDROID_GRADLE_JAVA_VERSION_INIT@
     }
 
-    @ANDROID_GRADLE_BUILD_FEATURE_AIDL@
-
     buildTypes {
         debug {
             packagingOptions {
@@ -139,7 +137,6 @@ android {
     }
 
     buildFeatures {
-        aidl true
         prefabPublishing true
         buildConfig true
     }
@@ -153,7 +150,6 @@ android {
         main {
             jniLibs.srcDirs = ['native/libs']
             java.srcDirs = ['java/src']
-            aidl.srcDirs = ['java/src']
             res.srcDirs = ['java/res']
             manifest.srcFile 'java/AndroidManifest.xml'
         }