Update Depdencies Used By `flutter_engine_group_performance` (#189229)

I raised the warn and error version in this PR:
https://github.com/flutter/flutter/pull/189109. The dependencies used by
`flutter_engine_group_performance` were not updated as a part of that
PR. I missed that update earlier, and I'm guessing that
`flutter_engine_group_performance` is post-submit test.

Fixes https://github.com/flutter/flutter/issues/189228 

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diff --git a/dev/benchmarks/multiple_flutters/android/build.gradle b/dev/benchmarks/multiple_flutters/android/build.gradle
index 8a840aa..70e79f1 100644
--- a/dev/benchmarks/multiple_flutters/android/build.gradle
+++ b/dev/benchmarks/multiple_flutters/android/build.gradle
@@ -4,13 +4,13 @@
 
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "2.2.0"
+    ext.kotlin_version = "2.2.20"
     repositories {
         google()
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.11.0'
+        classpath 'com.android.tools.build:gradle:8.11.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // Do not place your application dependencies here; they belong
diff --git a/dev/benchmarks/multiple_flutters/android/gradle/wrapper/gradle-wrapper.properties b/dev/benchmarks/multiple_flutters/android/gradle/wrapper/gradle-wrapper.properties
index 9758466..2b281b8 100644
--- a/dev/benchmarks/multiple_flutters/android/gradle/wrapper/gradle-wrapper.properties
+++ b/dev/benchmarks/multiple_flutters/android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Mon Feb 24 15:28:21 EST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists