Upgrade `android_fullscreen` to AGP 7.4.2 (#2094)

Where AGP == Android Gradle plugin

Upgrade carried out by Android Studio upgrade wizard

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-devrel
channel on [Discord].

<!-- Links -->
[Flutter Style Guide]:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
[CLA]: https://cla.developers.google.com/
[Discord]: https://github.com/flutter/flutter/wiki/Chat
[Contributors Guide]:
https://github.com/flutter/samples/blob/main/CONTRIBUTING.md

add_to_app/fullscreen/android_fullscreen/app/build.gradle

@@ -23,6 +23,7 @@ android {
         sourceCompatibility 1.8
         targetCompatibility 1.8
     }
+    namespace 'dev.flutter.example.androidfullscreen'
 }
 
 dependencies {

add_to_app/fullscreen/android_fullscreen/app/src/debug/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.flutter.example.androidfullscreen">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <!-- Include Cleartext traffic for the espresso package -->
 

add_to_app/fullscreen/android_fullscreen/app/src/main/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="dev.flutter.example.androidfullscreen">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <application
         android:name=".MyApplication"

add_to_app/fullscreen/android_fullscreen/build.gradle

@@ -7,7 +7,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.4'
+        classpath 'com.android.tools.build:gradle:7.4.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

add_to_app/fullscreen/android_fullscreen/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists