Reverts "Update template/test compileSdk, targetSdk, ndk versions (#152487)" (#153793)

Reverts: flutter/flutter#152487
Initiated by: gmackall
Reason for reverting: I forgot that I need to override the compileSdkVersion in the AGP 8.0 [instance of this test](ef9cd32f5a/dev/devicelab/bin/tasks/android_java17_dependency_smoke_tests.dart (L19))
Original PR Author: gmackall

Reviewed By: {reidbaker}

This change reverts the following previous change:
Updates `compileSdk`, `targetSdk`, and `ndk` versions (former 2 to latest, latter to the version of the ndk we are hosting on CIPD).

Summary of changes:
- Updates mentioned template values
- `compileSdk` 35 requires AGP 8.0+, so updated to 8.1 in many places.
- This also necessitated Gradle upgrades in most places
- This also necessitated moving the `package` xml attribute to the AGP `namespace` field in a couple places (test + template).
- Some tests use the output of `flutter create` but then use intentionally lower AGP versions. [I downgraded the `compileSdk` in these tests.](fee34fd61a)
- [Stopped lockfile generation](82324a2570) script from hitting the `hello_world` example because it uses `.kts` gradle files.
- One test needed [some Gradle options we had already added to templates](6aa187b4b6).

dev/tracing_tests/android/app/build.gradle

@@ -27,7 +27,6 @@ if (flutterVersionName == null) {
 }
 
 android {
-    namespace = "com.example.tracing_tests"
     compileSdk flutter.compileSdkVersion
 
     compileOptions {

dev/tracing_tests/android/app/src/main/AndroidManifest.xml

@@ -2,7 +2,8 @@
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file. -->
 
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.tracing_tests">
    <application
         android:label="tracing_tests"
         android:name="${applicationName}"

dev/tracing_tests/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip

dev/tracing_tests/android/settings.gradle

@@ -27,8 +27,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "8.1.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
+    id "com.android.application" version "7.3.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
 }
 
 include ":app"