WIP: chore(appcheck-recaptcha-enterprise): Integrate module into build system and manifest

This commit integrates the new `firebase-appcheck-recaptchaenterprise` module
into the project's build configuration and AndroidManifest.xml.

Key changes include:
- `AndroidManifest.xml`: Updated to include necessary permissions or components
  required by the reCAPTCHA Enterprise SDK or Firebase App Check.
- `firebase-appcheck-recaptchaenterprise.gradle`: Configures the build
  settings for the new reCAPTCHA Enterprise App Check module.
- `subprojects.cfg`: Adds `appcheck:firebase-appcheck-recaptchaenterprise`
  to the list of subprojects, making the module discoverable in the build.

Author: hiteshmaurya56

appcheck/firebase-appcheck-recaptchaenterprise/firebase-appcheck-recaptchaenterprise.gradle

@@ -0,0 +1,54 @@
+plugins {
+    id 'firebase-library'
+}
+
+firebaseLibrary {
+    libraryGroup = "appcheck"
+    releaseNotes {
+        name.set("{{app_check}} Recaptcha Enterprise")
+        versionName.set("appcheck-recaptchaenterprise")
+        hasKTX.set(false)
+    }
+}
+
+android {
+    adbOptions {
+        timeOutInMs 60 * 1000
+    }
+
+    namespace "com.google.firebase.appcheck.recaptchaenterprise"
+    compileSdkVersion project.compileSdkVersion
+    defaultConfig {
+        targetSdkVersion project.targetSdkVersion
+        minSdkVersion project.minSdkVersion
+        versionName version
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    testOptions.unitTests.includeAndroidResources = false
+}
+
+dependencies {
+    javadocClasspath libs.autovalue.annotations
+
+    api project(':appcheck:firebase-appcheck')
+    api 'com.google.firebase:firebase-annotations:16.2.0'
+    api 'com.google.firebase:firebase-common:21.0.0'
+    api 'com.google.firebase:firebase-common-ktx:21.0.0'
+    api 'com.google.firebase:firebase-components:18.0.0'
+    api 'com.google.android.recaptcha:recaptcha:18.8.0-beta01'
+
+    testImplementation(project(":integ-testing")) {
+        exclude group: 'com.google.firebase', module: 'firebase-common'
+        exclude group: 'com.google.firebase', module: 'firebase-components'
+    }
+    testImplementation libs.androidx.test.core
+    testImplementation libs.truth
+    testImplementation libs.junit
+    testImplementation libs.mockito.core.v5120
+    testImplementation libs.robolectric
+}

appcheck/firebase-appcheck-recaptchaenterprise/src/main/AndroidManifest.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!--Although the *SdkVersion is captured in gradle build files, this is required for non gradle builds-->
+    <!--<uses-sdk android:minSdkVersion="21"/>-->
+    <application>
+        <service
+            android:name="com.google.firebase.components.ComponentDiscoveryService"
+            android:exported="false">
+            <meta-data
+                android:name="com.google.firebase.components:com.google.firebase.appcheck.recaptchaenterprise.FirebaseAppCheckRecaptchaEnterpriseRegistrar"
+                android:value="com.google.firebase.components.ComponentRegistrar" />
+        </service>
+    </application>
+</manifest>

subprojects.cfg

@@ -3,6 +3,7 @@ appcheck:firebase-appcheck-debug-testing
 appcheck:firebase-appcheck-debug
 appcheck:firebase-appcheck-interop
 appcheck:firebase-appcheck-playintegrity
+appcheck:firebase-appcheck-recaptchaenterprise
 appcheck:firebase-appcheck
 appcheck:firebase-appcheck:ktx