fix(android): build on Firebase BoM 35 and require minSdk 24 (#18782)

* fix(android): resolve Firebase BoM 35 Firestore and ML Model Downloader deps

BoM 35 no longer manages ML Model Downloader, and Firestore 27 publishes test libraries as runtime dependencies that Jetifier cannot transform.

* refactor(android)!: require minSdk 24 for Firebase BoM 35

BoM 35 raises the Firebase libraries to API 24. Plugin configs and example apps that still pinned 23 would fail to compile against those libraries.

* fix(android): floor example apps at minSdk 24

Flutter 3.27 through 3.32 still default minSdk to 21. Those example apps would fail manifest merger against BoM 35 libraries.

Author: SelaseKay

packages/cloud_firestore/cloud_firestore/android/build.gradle

@@ -61,7 +61,14 @@ android {
     dependencies {
         api firebaseCoreProject
         implementation platform("com.google.firebase:firebase-bom:${getRootProjectExtOrCoreProperty("FirebaseSDKVersion", firebaseCoreProject)}")
-        implementation 'com.google.firebase:firebase-firestore'
+        // Firestore 27 publishes test libraries as runtime dependencies. Mockito
+        // pulls byte-buddy 1.17.7, which Jetifier cannot transform.
+        implementation('com.google.firebase:firebase-firestore') {
+            exclude group: 'org.mockito', module: 'mockito-core'
+            exclude group: 'junit', module: 'junit'
+            exclude group: 'com.google.truth', module: 'truth'
+            exclude group: 'com.fasterxml.jackson.core', module: 'jackson-databind'
+        }
     }
 }
 

packages/cloud_firestore/cloud_firestore/android/local-config.gradle

@@ -1,6 +1,6 @@
 ext {
     compileSdk=34
-    minSdk=23
+    minSdk=24
     targetSdk=34
     javaVersion = JavaVersion.toVersion(17)
     androidGradlePluginVersion = '8.3.0'

packages/cloud_firestore/cloud_firestore/example/android/app/build.gradle

@@ -42,7 +42,7 @@ android {
         applicationId = "io.flutter.plugins.firebase.firestore.example"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion = flutter.minSdkVersion
+        minSdkVersion = Math.max(flutter.minSdkVersion, 24)
         targetSdk = flutter.targetSdkVersion
         versionCode = flutterVersionCode.toInteger()
         versionName = flutterVersionName

packages/cloud_firestore/cloud_firestore/pipeline_example/android/app/build.gradle.kts

@@ -23,7 +23,7 @@ android {
         applicationId = "com.example.pipeline_example"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = flutter.minSdkVersion
+        minSdk = maxOf(flutter.minSdkVersion, 24)
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName

packages/cloud_functions/cloud_functions/android/local-config.gradle

@@ -1,6 +1,6 @@
 ext {
     compileSdk=34
-    minSdk=23
+    minSdk=24
     targetSdk=34
     javaVersion = JavaVersion.toVersion(17)
     androidGradlePluginVersion = '8.3.0'

packages/cloud_functions/cloud_functions/example/android/app/build.gradle

@@ -41,7 +41,7 @@ android {
         applicationId = "io.flutter.plugins.firebase.functions.example"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion = flutter.minSdkVersion
+        minSdkVersion = Math.max(flutter.minSdkVersion, 24)
         targetSdk = flutter.targetSdkVersion
         versionCode = flutterVersionCode.toInteger()
         versionName = flutterVersionName

packages/firebase_ai/firebase_ai/android/local-config.gradle

@@ -1,6 +1,6 @@
 ext {
     compileSdk=34
-    minSdk=23
+    minSdk=24
     targetSdk=34
     javaVersion = JavaVersion.toVersion(17)
     androidGradlePluginVersion = '8.3.0'

packages/firebase_ai/firebase_ai/example/android/app/build.gradle.kts

@@ -25,7 +25,7 @@ android {
         applicationId = "io.flutter.plugins.firebase.tests"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = flutter.minSdkVersion
+        minSdk = maxOf(flutter.minSdkVersion, 24)
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName

packages/firebase_analytics/firebase_analytics/android/local-config.gradle

@@ -1,6 +1,6 @@
 ext {
     compileSdk=34
-    minSdk=23
+    minSdk=24
     targetSdk=34
     javaVersion = JavaVersion.toVersion(17)
     androidGradlePluginVersion = '8.3.0'

packages/firebase_analytics/firebase_analytics/example/android/app/build.gradle

@@ -47,7 +47,7 @@ android {
         applicationId = "io.flutter.plugins.firebase.tests"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdk = 23
+        minSdk = 24
         targetSdk = flutter.targetSdkVersion
         versionCode = flutterVersionCode.toInteger()
         versionName = flutterVersionName