build(app): add missing Android namespace attributes of dependencies

app/android/build.gradle

@@ -18,6 +18,34 @@ allprojects {
     }
 }
 
+// From https://medium.com/@vortj/solving-namespace-errors-in-flutters-android-gradle-configuration-c2baa6262f8b
+subprojects {
+    afterEvaluate { project ->
+        if (project.hasProperty('android')) {
+            project.android {
+                if (namespace == null) {
+                    namespace = project.group.toString()  // Set namespace as fallback
+                }
+                project.tasks.whenTaskAdded { task ->
+                    if (task.name.contains('processDebugManifest') || task.name.contains('processReleaseManifest')) {
+                        task.doFirst {
+                            File manifestFile = file("${projectDir}/src/main/AndroidManifest.xml")
+                            if (manifestFile.exists()) {
+                                String manifestContent = manifestFile.text
+                                if (manifestContent.contains('package=')) {
+                                    manifestContent = manifestContent.replaceAll(/package="[^"]*"/, "")
+                                    manifestFile.write(manifestContent)
+                                    println "Removed 'package' attribute from ${manifestFile}"
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
 rootProject.buildDir = '../build'
 subprojects {
     project.buildDir = "${rootProject.buildDir}/${project.name}"