Reverts "Update gradle lockfiles template" (#142889)

Reverts flutter/flutter#140115

Initiated by: bartekpacia

Reason for reverting: broke the tree

- [`Linux firebase_abstract_method_smoke_test`](https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20firebase_abstract_method_smoke_test/15844/overview)
- [`Linux_android android_view_scroll_perf__timeline_summary`](https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20android_view_scroll_perf__timeline_summary/13453/overview)
- [`Linux_android platform_views

Original PR Author: bartekpacia

Reviewed By: {gmackall}

This change reverts the following previous change:
Original Description:
This PR updates almost* all Gradle buildscripts in the Flutter repo the `example` and `dev` (in particular, in `dev/integration_tests` and in `dev/benchmarks`) directories to apply Flutter's Gradle plugins using the declarative `plugins {}` block.

*almost, because:
- add-to-app (aka hybrid) apps are not migrated (related https://github.com/flutter/flutter/issues/138756)
- apps that purposefully use build files to ensure backward compatibility (e.g. [`gradle_deprecated_settings`](https://github.com/flutter/flutter/tree/3.16.0/dev/integration_tests/gradle_deprecated_settings))

dev/tracing_tests/android/app/build.gradle

@@ -2,12 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-plugins {
-    id "com.android.application"
-    id "dev.flutter.flutter-gradle-plugin"
-    id "kotlin-android"
-}
-
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -16,6 +10,11 @@ if (localPropertiesFile.exists()) {
     }
 }
 
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
 if (flutterVersionCode == null) {
     flutterVersionCode = '1'
@@ -26,6 +25,10 @@ if (flutterVersionName == null) {
     flutterVersionName = '1.0'
 }
 
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
 android {
     compileSdk flutter.compileSdkVersion
 
@@ -65,5 +68,5 @@ flutter {
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.6.0"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }

dev/tracing_tests/android/build.gradle

@@ -2,6 +2,19 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+buildscript {
+    ext.kotlin_version = '1.6.0'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
 allprojects {
     repositories {
         google()

dev/tracing_tests/android/settings.gradle

@@ -2,33 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// This file is auto generated.
-// To update all the settings.gradle files in the Flutter repo,
-// See dev/tools/bin/generate_gradle_lockfiles.dart.
+include ':app'
 
-pluginManagement {
-    def flutterSdkPath = {
-        def properties = new Properties()
-        file("local.properties").withInputStream { properties.load(it) }
-        def flutterSdkPath = properties.getProperty("flutter.sdk")
-        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
-        return flutterSdkPath
-    }
-    settings.ext.flutterSdkPath = flutterSdkPath()
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
 
-    includeBuild("${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle")
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 
-    repositories {
-        google()
-        mavenCentral()
-        gradlePluginPortal()
-    }
-}
-
-plugins {
-    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.6.0" apply false
-}
-
-include ":app"
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"