Remove some lambdas from Utils::transform calls

It is often possible to user (member) functions or members directly.
That improves readablility and potentially reduces the total number of
symbols.
Also use qobject_container_cast at places where it is appropriate.

Change-Id: Ia2591bca356591e001e2c53eeebcf753e5bc3c37
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/android/androidsdkmanager.cpp

@@ -313,9 +313,7 @@ SdkPlatformList AndroidSdkManager::installedSdkPlatforms()
 {
     AndroidSdkPackageList list = m_d->filteredPackages(AndroidSdkPackage::Installed,
                                                        AndroidSdkPackage::SdkPlatformPackage);
-    return Utils::transform(list, [](AndroidSdkPackage *p) {
-       return static_cast<SdkPlatform *>(p);
-    });
+    return Utils::qobject_container_cast<SdkPlatform *>(list);
 }
 
 const AndroidSdkPackageList &AndroidSdkManager::allSdkPackages()