Android: fix debugging with qbs

If the default libs path doesn't exist (which is the case for qbs) then
try to get the abis using the current project node data method using
the Android::Constants::ANDROID_ABIS flag.

Because in multiplex (multi arch) mode dynamic libraries are compiled in
different products, library paths must be gathered from those
sibling products using the "dependencies" json array.

Change-Id: I9409a6a12fd9f304f427ed7868a7060c8f985a0b
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/android/androidmanager.cpp

@@ -372,6 +372,11 @@ static QString preferredAbi(const QStringList &appAbis, const Target *target)
 QString AndroidManager::apkDevicePreferredAbi(const Target *target)
 {
     auto libsPath = dirPath(target).pathAppended("libs");
+    if (!libsPath.exists()) {
+        if (const ProjectNode *node = currentProjectNode(target))
+            return preferredAbi(node->data(Android::Constants::ANDROID_ABIS).toStringList(),
+                                target);
+    }
     QStringList apkAbis;
     for (const auto &abi : QDir{libsPath.toString()}.entryList(QDir::Dirs | QDir::NoDotAndDotDot))
         if (!QDir{libsPath.pathAppended(abi).toString()}.entryList(QStringList("*.so"), QDir::Files | QDir::NoDotAndDotDot).isEmpty())