Fix debugging armv7a & x86 when running on 64 bit targets

We need to choose the preferred ABI based on what it's in the package
not based on what Qt supports.

Change-Id: I243fbf67913af7804af868d507323c0934ad3752
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/android/androidmanager.cpp

@@ -433,11 +433,6 @@ static QString preferredAbi(const QStringList &appAbis, Target *target)
     return {};
 }
 
-QString AndroidManager::devicePreferredAbi(Target *target)
-{
-    return preferredAbi(applicationAbis(target), target);
-}
-
 QString AndroidManager::apkDevicePreferredAbi(Target *target)
 {
     auto libsPath = dirPath(target).pathAppended("libs");