[webview]: Bump gradle from 3.3.0 to 7.1.2 in /packages/webview_flutter/webview_flutter_android/example/android (#5844)

diff --git a/packages/webview_flutter/webview_flutter_android/example/android/app/build.gradle b/packages/webview_flutter/webview_flutter_android/example/android/app/build.gradle
index fdd8193..19c77ef 100644
--- a/packages/webview_flutter/webview_flutter_android/example/android/app/build.gradle
+++ b/packages/webview_flutter/webview_flutter_android/example/android/app/build.gradle
@@ -58,5 +58,5 @@
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
-    api 'androidx.test:core:1.2.0'
+    api 'androidx.test:core:1.4.0'
 }
diff --git a/packages/webview_flutter/webview_flutter_android/example/android/build.gradle b/packages/webview_flutter/webview_flutter_android/example/android/build.gradle
index e101ac0..e29a443 100644
--- a/packages/webview_flutter/webview_flutter_android/example/android/build.gradle
+++ b/packages/webview_flutter/webview_flutter_android/example/android/build.gradle
@@ -5,7 +5,7 @@
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.0'
+        classpath 'com.android.tools.build:gradle:7.1.2'
     }
 }
 
diff --git a/packages/webview_flutter/webview_flutter_android/example/android/gradle.properties b/packages/webview_flutter/webview_flutter_android/example/android/gradle.properties
index a673820..94adc3a 100644
--- a/packages/webview_flutter/webview_flutter_android/example/android/gradle.properties
+++ b/packages/webview_flutter/webview_flutter_android/example/android/gradle.properties
@@ -1,4 +1,3 @@
 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-android.enableR8=true
diff --git a/packages/webview_flutter/webview_flutter_android/example/android/gradle/wrapper/gradle-wrapper.properties b/packages/webview_flutter/webview_flutter_android/example/android/gradle/wrapper/gradle-wrapper.properties
index 2819f02..cc5527d 100644
--- a/packages/webview_flutter/webview_flutter_android/example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/packages/webview_flutter/webview_flutter_android/example/android/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip
diff --git a/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml b/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml
index 85990bd..b457ca6 100644
--- a/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml
+++ b/packages/webview_flutter/webview_flutter_android/example/pubspec.yaml
@@ -20,7 +20,7 @@
     path: ../
 
 dev_dependencies:
-  espresso: ^0.1.0+2
+  espresso: ^0.2.0
   flutter_driver:
     sdk: flutter
   flutter_test: