I'm in the process of upgrading the Gradle version in our Qt Android project from Gradle 4.1.0 to 7.4.1. This newer version of Gradle deprecates the use of a 'package' attribute in the 'manifest' element of the AndroidManifest.xml file. We have this in our AndroidManifest.xml file:

<?xml version="1.0" encoding="utf-8"?>
<manifest
  package="com.trimble.access"
  ...etc> 

When I build the project, Gradle reports a warning about 'package' being deprecated:

package="com.trimble.access" found in source AndroidManifest.xml: C:\dev\access\Survey\Android-ARM64-Release\android-build\AndroidManifest.xml.
Setting the namespace via a source AndroidManifest.xml's package attribute is deprecated.
Please instead set the namespace (or testNamespace) in the module's build.gradle file, as described here: https://developer.android.com/studio/build/configure-app-module#set-namespace 

I tried doing exactly what this warning suggested - removing the 'package' attribute from the manifest, and adding a 'namespace' setting in the build.gradle file:

android {
    namespace = "com.trimble.access"
    ...etc
}

But now the build fails entirely, as androiddeployqt reports a fatal error:

Invalid android manifest file: C:/dev/Android-ARM64-Release/android-build/AndroidManifest.xml

I found the source code for androiddeployqt on code.qt.io, and it's clear that it's going to unconditionally fail with this error if the 'package' attribute is not present:

    if (!reader.attributes().hasAttribute("package"_L1)) {
        fprintf(stderr, "Invalid android manifest file: %s\n", qPrintable(androidManifestPath));
        return false;
    } 

Now that the 'package' attribute is not only optional, but deprecated, this check no longer makes sense.